About Lamps

Robin Green asked:


Increasingly consumers are turning their eyes towards LED house lights as a way to conserve electricity. But will you really achieve the greatest savings by buying this still expensive lighting now? Or would you be better off to save your money for the time being, or to buy other energy-efficient light bulbs, and use the money you save in electricity to buy LED house lights down the road?

You have most likely seen LEDs before: camping headlamps, LED Christmas tree lights, wind-up emergency torches. How about LED house lights? If LEDs are so efficient, why aren’t manufacturers lining up to sell LED lights for the home, and why aren’t we lining up to buy them?

I wouldn’t try to sell you on LED lights as a solution to high utility bills or as the most ecologically beneficial lighting solution around. Frankly, I think LEDs have a ways to go yet, in terms of function, durability, and economy. There are some LED products you should consider over the next year, such as LED Christmas lights. And you might enjoy trying out a couple of LED light bulbs, if you’re the energy-saving type. But you are going to save more money by keeping with your current lighting, and migrating to fluorescent lights in the next year or so. Compact fluorescent lights, or CFLs, have a payback so short that they’ll pay for themselves before LEDs have matured enough to make CFLs out of date.

LED light bulbs are more efficient than incandescent or fluorescent lighting. The problem is that LEDs have very directed light. An incandescent light shines over a wide area fairly evenly, while LED lights are very focused, so that the area they directly illuminate is very bright, while the further you go from the direct beam, the less light there is. For LED Christmas lights, that isn’t a problem; you just want some shining points of light, which LEDs do very efficiently. But an incandescent or CFL will do a much better job of brightening up your living room than an LED bulb in the same application. The light will be more evenly and broadly spread, and with a warmer color.

When you see LED packaging claims of LED light output, you should be doubtful. A number in Lumens, which indicates light brightness, is misleading for LEDs, because of their focused beam. Lumens levels are read from a sensor placed right underneath the light source. A household LED light bulb at 2 watts may have the same lumens rating as a 50 watt halogen bulb, or as a 15 watt CFL, but the LED lamp may only send a focused light directly under it to the photo sensor, while the incandescent light and CFL will light up a much broader area, and still give that same lumens rating for the area immediately beneath the bulb. This may be the source of a frequent negative comment among LED owners, such as: “The packaging claims this 2-watt LED bulb has the same light output as a 50-watt incandescent bulb but it feels more like a 25-watt incandescent if you ask me.”

When it comes to halogen lights, they are only as efficient as incandescent lights, so the same efficiency considerations apply here. But since halogen lights are typically much more direct than incandescent bulbs, LED lights that are designed to replace halogen lights are both more efficient than the halogens they replace, and work well for the direct light that halogen bulbs provide. You can find LED replacement bulbs for the most common halogen fixtures such as GU10 and MR13, and this may be a good place to start the switchover.

LED house light designers work around the issue of the narrow beam of a single LED, by building household LED light bulbs that are a collection of individual LEDs, with each diode aimed at a different angle, so that a wider area is highly illuminated. This increases the area of full light coverage of an LED light. However very few such bulbs provide the breadth of area coverage of existing incandescent bulbs or CFLs and at the same time are bright enough.

Where LED lights outshine existing bulbs is as replacements for lighting that is (or should be) highly directed. For example, a light in a narrow hallway, where the chief point of the light is to show people their way down the hall, would be a good application for LEDs.

Task lighting is another example of an application where LEDs shine. Why light up your entire work room if all you need to see is the tools on the work bench right before your eyes? A couple of LED bulbs hanging above the work area will do the trick nicely. But you can only cost-justify this in energy savings if you live half your life in the workroom.

LED light bulbs are, in theory at least, very durable, when compared to incandescent bulbs and compact fluorescent bulbs. LED bulb life ranges from 35,000 to 200,000 hours, compared to 1,000 hours for a good incandescent light, and 8,000 hours for a CFL. But I have seen many consumer ratings of LED bulbs that report burn-out within a few days of being switched on. Clearly there are some quality problems still to be worked on - yet another good reason for holding off a couple of years before switching wholesale to LEDs.

Whether LEDs will really live up to their long lasting billing remains to be seen - even the 35,000 hour ones would need to be on 24×7 for 4 years before they come close to reaching their advertised range. And LED lights do dim with age - so while a bulb might have a lifetime of 35,000 hours, it won’t emit its starting light level for the full 35,000 hours - the older it gets, the less light it will emit. LED lights do decline progressively in light intensity and therefore in efficiency, although they will still be more efficient than either CFLs or incandescent bulbs throughout their life.

The “color temperature” of a light bulb, measured in ‘degrees Kelvin’, determines human visual response to its light. You are probably comfortable with the yellowish glow of incandescents at around 2800 Kelvin (2800K), even though fluorescent lighting is closer to the natural daylight temperature of 6000K. Any LED with a temperature of 6000K or higher will seem bluish, and any LED with a color temperature above 4000K will appear whiter than an incandescent bulb.

While homeowners are typically worried about how fluorescent or LED lights can make their rooms look blinding white instead of the comforting yellow glow provided by incandescent bulbs, you should remember that a little sacrifice in color temperature will put a big dent in your electricity bill. Be a trend-setter, not a trend-follower - start converting your home lighting to true daylight colors, whether with CFL lights or LED light bulbs. You will be helping your family and friends to switch over, when they find out they won’t be the only ones with a slightly bluer light hue in their homes.

Whether you switch a few of your lights to LED lights now, or let the technology and reliability improve, you can count on the fact that LEDs will play an increasing role in lighting our houses in the years ahead. I personally think it makes sense to wait, except in certain special lighting situations where the direct, high-color-temperature light of LEDs is what you’re after, and where money is no object. If you just want to save money - or to cut your energy use for environmental reasons - an equal amount of money spent on CFLs, or most other energy efficiency upgrades, will cut your energy bills and carbon footprint more than buying the LED lights now available.



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Dan Stroup asked:


What type of lighting is right for me?

Too often people only think about lighting when their room is too dark and they are having trouble seeing or that they do not care for a particular fixture anymore and would like to have it replaced.  When in actuality there is potential for lighting to bring out the beauty of your surroundings. 

 

There are three types of lighting:  general lighting, task lighting, and accent lighting and they all have their own special purpose.  

 

General Lighting - These types of lights are usually in the form of recessed lights, surface mounted fixtures, semi flushed fixtures, or hanging fixture. 

 

Now where most people fail to think outside the box is if you already have a service-mounted fixture it is very easy to replace that with recessed lighting, which is a more even light throughout the room.  This is not very difficult even if there is no access above the space you are installing the lights due to the holes that are created for the high hats to go into.  One concern of many people is the amount of heat loss after installing high hats into a space, which has an attic access above.  Not to worry because the new recessed lights have gaskets and are constructed to be airtight.  What this means is that it is almost like the ceiling was never opened and that a surface mounted or hanging fixture actually will have more heat loss.

 

Task Lighting - There are many different kinds of task lighting, such as pendants over islands and peninsulas, chandeliers over tables and scones over vanities.  Two of my favorite types of task lights are under cabinet lights and closet lights.  Under cabinet lighting is special because it is multifunctional.  When you are cooking, it provides the illumination needed on the counter top but when the cooking is done and the lights are dimmed, it serves as a nice night light for your kitchen area.

 

Closet lights re a nice feature for everyone trying to get ready in the morning.  The best type of light to use in a closet is fluorescent.  Now I know many of you cringe when you hear the words “fluorescent lighting” but it is the best way to color match your clothes. 

 

Clothes under an incandescent light tend to have a yellow tint.  While clothes under a fluorescent light tend to show truer color because it is the closest thing to natural sun light that is currently offered.  Trying to choose colors that match should not be a stressful part of your day.

 

Accent Lighting - This is my favorite type of lighting because it is a way of creatively adding illumination while calling attention to the things in which you are most passionate.  One way to accentuate the architecture is to lay rope lighting in the modeling of a tray ceiling and watch the ambience of light that is cast from atop the tray.  Smaller low voltage recessed lights with directional trims can be used to illuminate artwork, credenzas and china cabinets.  One of the great things about this type of lighting when used with artwork is when the amount of light on the artwork is adjusted the color appear to change before your eyes.  

 

Another example of how to use lighting creatively is by illuminating your favorite plants.  They can be lit by overhead lighting to capture the surface colors of your favorite plants or by lighting from underneath where light is filtered through your foliage creating a unique cascading effect.  

 

Sconces were reference early as task lighting but they also make for great accent lighting when pictures and mantles are properly flanked giving it a more traditional look.

 

 



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novakc2006 asked:


I started to grow live plants in my aquarium and i want to know what kind of lighting or lights you need for them. Is there a specific kind of lights i need to buy. I hope someone can help me out here.

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Light therapy asked:


Doing sport regularly and having a good diet is essential for our well being. Research by Leppämaki S, Partonen T, Lönnqvist J have shown that associating light therapy and sport improve the results sensibly.

In principle : Physical exercise lessens the depressive symptoms, aswell as being exposed to light (paricularly in the winter seasons).

The object of the test : to compair the effect of just exercise or to combine it with light therapy and to verify the effects on our humour and the quality of life.  The test lasts 8 weeks and the results of the questionnaire on humour and quality of life are relative to our health and are linked.

Results : Physical exercise were effective to diminue the depressive symptoms if the person was exposed to light therapy.

So, if you exercise at home install a light therapy lamp infront of your apparatus, the result can only be better.

Professional athletes have understood the interest :

Certain football clubs have been equiped in the changing rooms with light therapy lamps (Baseball football team from Switzerland).

The british rowing team, gold medalists in the Olympic games in Athens in August 2004, were equiped with dawn simulators (also known as sunrise alarm clocks or even light alarms) : 4 members of the team used the dawn simulator to awake them during the games.

One of the members ED Cooke said, “when the final starting getting closer we had to get up earlier and earlier, because it is not light in Athens till 6h30 in the morning, it was great to wake up with sunlight at 4h45 in the morning.  The simulators woke us up full of energy for the final”.

In conclusion Ed Cooke is without ambiguity :

“The simulators have certainly made a difference.  It was alot more useful than we thought it would be!”.

You will find any additional information needed on the dawn simulator or on light therapy at Solvital light therapy.



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Vikram Kumar asked:


Light is no doubt one of the most essential things that is required on a day-to-day basis. Without light, one can’t even imagine survival; be it natural light or artificial light. When light is so important it is very important to plan its proper lighting design in the best manner. Though we cannot do anything with the natural light once the sun goes down, there are several possibilities with decorative electrical lighting. We can adjust home lighting for our daily needs for both function and style.  Put those candles in the drawer and think about lighting your home effectively. There is nothing worse than having a dimly lit home.

It is important to note that while planning inside or even outside of the house lighting plays a very important role. Many homeowners make the mistake of overlooking the outdoor lighting and bathroom lighting that they currently have.  It is understandable.  When purchasing a new home there are so many areas that are in need of your attention, and the lighting tends to take a back seat.  However, you would be amazed with the results by just replacing a few of your lights around your house.  Be the talk of the neighborhood!

Planning outdoor lighting is also very important. This is true because the real look of the house is from outside, so your front entrance needs some attention. Without proper outdoor lighting the whole charm of the house will be lost, so it is important to plan outdoor lighting in the best manner.  Why spend all that money on landscaping and painting and then keep your existing weathered beaten 20 year old light fixtures? You might be surprised how affordable decorative lighting can be.

The second lighting aspect of your home is bathroom lighting, which is also often overlooked by most homeowners. It is important to note that your bathroom is one of the most trafficked room in your home. Every member of your family will spend time there on a daily basis, so it needs to look attractive and comfortable. Lighting not only helps in making things visible but there are several other important advantages also. For example, with good lighting you can give the illusion of additional space. Good lighting also helps in creating an ambient atmosphere. So it is important to give strong emphasis on proper bathroom lighting for all your important daily rituals of shaving, showering, and applying makeup.

Taking your time and planning your outdoor lighting and bathroom lighting with some research is a very good idea. For your convenience there are various online as well as local lighting shops available to buy products and get advice. However, if you are looking for one stop shopping where you will find excellent lighting expertise, superior customer service, and one of the best selections of lighting around, then look no further. BackBayLighting is the place for you.  Thousands upon thousands of prior happy customers can’t be wrong.

BackBayLighting is one such online store from where you can find all sorts of lighting for the interior and exterior of your home. It is important to note that lights from all the major and popular brands are available at BackBayLighting. So if you are looking for extraordinary ceiling lights, lamps of all sorts, beautiful wall lights or outdoor lighting, you can get the best collection at BackBayLighting.

There is light for every corner of your house available at BackBayLighting and the best part is that they are available in all different styles and patterns that will match the rooms of your house perfectly. It might be surprising for you to note that with all these important features, the prices that BackBayLighting offers on all their items is just hard to believe. You can get the best collection at the best prices. If you are worried about high shipping costs, then you need not to worry at all, as shipping is absolutely free on all of their items. For what are you waiting for? The best selection, best pricing, and best service is ready and waiting…check out BackBayLighting today!



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mascorrofactor asked:


this is for an ap bio planning lab. we wanna see how the spectrum of light affects plant growth, so we have a normal light bulb and a black (purple-ish) one. we could only afford fluorescent ones.
which plants are easy to keep alive with fluorescent lighting? we have to start with seeds, by the way.

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Chris Dallman asked:


One can find sophisticated Police Lights and these lights can be very helpful. Police Lights make people aware so that they can understand that a police car is nearing them. Absolute care is maintained in the construction of these lights so that Police Lights can be recognized even from far-off places. These lights are also called Emergency LED Lighting as they blink every now and then.

Technology Used

In the making of Police Lights a state-of-the-art technology is used and owing to this reason, these lights are used in the wake of emergency. As far as the issue of durability is concerned, these lights do not lack in this department.

Attributes of Police Lights

The intensity of the Police lights, is known to its users and best thing is that these lights are backed by modern technology. The working capacity of these lights are as long as LEDs and are best known for consuming less power. The heftiness of these lights is known worldwide. These lights are best known for sensing any crime and provide elaborative information regarding great danger.

Red LED lights point out warning and blue LED lights provide a complete signal that a police car is about to approach at any time. Police Lights make use batteries and this is the main reason of their durability.

Diverse Colors of Police Lights

One can pick particular light as per the requirement as these lights are available in diverse colors. Most of us require these lights and once it is installed on our vehicle it makes that vehicle quite noticeable.

Visibility Factor

Sometimes, Officials of police departments prefer using flash lights in order to locate those individuals who are missing due to some reason. As the visibility of Police Lights is quite prominent, these lights are also called Law Enforcement Lights.

Safety Factor

The approximate measurement of these lights is 250 feet and from security point of view, these lights are quite protected. Criminals can not commit anything wrong if they notice the light from longer distance.

These lights also make people aware of road mishaps as most of us indulge in dangerous driving. The optical system of these lights is considered best and owing to this reason, these lights can be used in unfortunate situations.

You can find a good list of those manufacturers who produce qualitative Police Lights . Another similar product in this category is light bars that also serve the same purpose. LED Strobe Lights have earned a good name in the field of reputation and response time of these lights is also good. Blue Emergency Vehicle Lights also belong to the same category and the intensity of these lights is also very strong.

Online Availability

Now-a-days you can take assistance of online resources in order to procure these lights. Websites will offer you details of qualitative products and best thing is that you can have these products at affordable cost.

So, police lights make use of sophisticated technology and these lights come in diverse categories. One can pick particular police light as per one’s requirement.

 



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R. Neal asked:


Commercial lighting systems are often much more complicated than they appear at face value. A significant number of factors influence the selection of equipment, placement of fixtures, and levels of illumination appropriate to structures, terrain, and activity. Most companies in today’s recession fear the costs associated with a commercial lighting system and seek to reduce overhead with generic equipment. This creates more problems than it solves. Cheap fixtures and poor design creates blinding spots of glare that cast shadows, creating both an eyesore and a number of safety and security hazards.

It is better to make a one-time investment in a truly effective commercial lighting system that consists of five standard elements. Operating as a virtual lighting agency that is dedicated to America’s best equipment and design strategies, RLLD Commercial Lighting develops commercial lighting systems that address these five major arenas and customizes each particular element to the specific size and style of the individual facility.

Commercial Interior Lighting

Choosing interior lights for commercial systems is simple and cost effective when a few basic factors are considered with each purchase. First, what room or building will the fixture illuminate? How many employees will be in this room, and what will they be doing there? How important is high color rendering to safe and productive labor? Will the lights be on continuously, or will they be on only when workers enter for a few minutes at a time?

Commercial lighting systems in factories and warehouses normally feature cool-burning fluorescents in these areas that require fewer bulb replacements, minimal heat, and reduce power consumption. In offices, halogen lights provide superb color rendering and glare free lighting for people working at computers, copy machines, and desks. Interior commercial light systems can be built per room, per specific task, in this fashion. One or two metal halide lights in a manager’s office is all one needs for a touch of decorative color. Fluorescents that give task light only when needed help further reduce electrical costs in bathrooms and kitchens, and the heat recycling ability of halogen lights proves itself ideal illumination in rooms where power conservation and human comfort are equally desirable conditions.

Commercial Security Lighting

Commercial lighting systems should always create a secure perimeter along the property line and provide bright lighting near and around the building. This is especially true for organizations with night crews working on loading docks, or maintenance and cleaning crews entering and exiting the building in the dark. These people need to clearly see their surroundings without being blinded by glare and without any shadows that could hide an intruder or lead to an injury in the dark.

Commercial security light systems can be very cost effective. RLLD Commercial floodlights can be controlled by timers that turn lights on at sundown and off at sunrise. Motion sensors can also be wired to these fixtures, turning them on only when a potential intruder triggers the photocell sensor. Such cost effective, but highly effective light sources help security cameras and guards can see more clearly around the edges of buildings and across the property between the building and the parking areas.

Parking Lot Lighting

Appropriate visibility in the parking lot constitutes a major factor in every commercial lighting system. Glare free parking lot lights will increase visibility between vehicles, eliminating any dark areas that car thieves and burglars can use for hiding spaces. Parking lot lights are actually regulated by the government and by law must produce a minimum of four foot candles of light. To make certain you are proposing the right poles and fixtures to your client,

Commercial Exterior Lighting

Exterior lights are critical elements in commercial lighting systems as they illuminates all sides of the building and ensure that building access points are clearly lit in a balanced level of light that dispels shadows without glare. RLLD Commercial Lighting designers utilize skills learned in architectural design cross training programs that enable them to link multiple buildings together in a field of natural-looking light that prevents unauthorized personnel from approaching the building without detection. We also recommend placing additional, selective lighting around driveways and signs to ensure safe after-hours access for authorized vehicles and night deliveries.

Commercial Landscape Lighting

Commercial lighting systems best serve the sense of unity between architecture and the natural landscape when they create 4 layers of illumination. While many lighting designers normally only utilize two layers to illuminate grounds and earthworks, RLLD Commercial Lighting specialists will help any outdoor lighting contractor develop a multi-layered system using advanced photometric design tools and sophisticated specialty equipment.

After many years of partnership with leading landscapers, we have perfected a technique of combining distinctive layers of light that allows us to light everything from park areas, atriums, trees, flower beds, and tree lines at high-end resorts.

All of the products we provide for commercial lighting systems are American made and are manufactured here in the US. RLLD Commercial Lighting sells only standard commercial grade and specification grade lighting fixtures and provides free, adjunct lighting design services and selective turnkey installations for commercial lighting design contractors.



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Light therapy asked:


Although English people are only just starting to discover light therapy lamps, there is a new product on the market : the light therapy glasses called LUMINETTE.

This products’ clarification was done by researchers of Liège University and its’ industriel partners who wanted to creat an original model giving maximum theraputic effectiveness bringing the source of light to the eye without any complications.

The advantage of this high-tech product is that you can wear it while going about your business and still benefit from the light therapy at work or while doing your daily activities without any discomfort you can even wear the luminette with perscription glasses.

A reminder for those who do not know about light therapy yet.  It is just as the name suggests therapy from lights.  Light therapy started in the United States thanks to a famous professor Rosenthal who first discovered the link between winter depression also called seasonal depression and the lack of light.

The treatment consists of a daily exposure to a light therapy medical lamp due to a loss of sunlight in winter.  It helps to beat seasonal depression, tiredness, gloomy humour and to find energy and vitality in the middle of winter.

The use of these lamps is also recommended to night workers to people who do alot of travelling, to compensate for the effects of jet lag.  In these 2 cases, the straightforwardness and the easiness of the use of the luminette can be particularly appreciated.

 

 



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Light therapy asked:


Light therapy has been used for a number of years to get round the loss of light in winter.1 man out of 10 and 1 woman out of 5 suffer from winter blues and in certain cases seasonal depression called SAD Seasonal Affective Disorder.

We are coming up to the shortest days of the year, a period where there are the most cases of seasonal depression, winter blues, which is tiredness in the morning, lack of dynamism, becoming irritable, gloomy humour, sleeping trouble, a lack of libido.  These symptoms are due to a loss of sleep, which can easily be beaten thanks to the use of light therapy lamps.  All you have to do is be exposed infront of a lamp that reproduces natural sun light (about 2500 and 10000 lux), preferably in the morning, for about half an hour.  You will find all your energy as if you were in August.

To find out more on light therapy, its medical basics and to find a light therapy lamp or light therapy glasses LUMINETTE which have been agreed by the EU medical board go to :

Solvital light therapy

Think of them for birthdays or anniversary and offer your friends a bit of well being.



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