What do you get if you put traditional lighting suppliers, LED suppliers and the NHS in a room? - This may sound like a joke but it's not. Rotherham NHS is looking to the future and trying to find ways to reduce the lighting related energy bill.
When designing products these days, designers have to be very conscious of their choices in regards to materials and processes used for manufacture. A lot of people assume that a products impact on the environment is only relevant when the product is in use. However, products which can be relatively eco friendly to run, such as the Hybrid cars, can be very un-eco friendly to manufacture and dispose of.
What people in the LED community fail to realise is that the T12 and T8 flourescent tubes are really really good at what they do. They are very efficient, (more efficient than the production LEDs you can buy today), far cheaper to make and realitively long lifed. Until LEDs have improved their efficiency by another 50% its pointless anyone trying to make a replacement for the T12 and T8 use in general office type lighting.
In specialist lighting it does make sense but they didn't win the job on the basis of unit cost or efficiency. Unfortunately no optic will help anyone beat the T12 and T8 because using it doesn't reduce the cost over bare LEDs and it doesn't create more Lumens.
I frequently have to use Google to check up on the accuracy of material I have received from different during the normal course of my working day.
One thing I've noticed recently is a complete spam of research papers (usually yours from anything between $495 and $4,995) taking up the first page of my search results. These papers seem to come from a variety of self proclaimed "experts" and promise you some kind of way to get ahead of the market if you'd only get out your credit card.
The way LED bulbs give off heat, and the way halogen bulbs give off heat are completely opposite. Halogen bulbs give off heat from the light they output, warming up the rooms they light. LEDs give off heat from behind the light source, and if this is not dispersed correctly the LED will lose it's brightness and eventually stop working.
As a lighting designer, the most common question I hear in regards to LED is:
"Can I light my room with them?".
Most people simply want to know if they can replace their filament bulb with something more energy efficient. The simple answer to this is yes. Our company have lit a number of houses, solely with LED. The energy consumption for lighting has been reduced by 75%, whilst still giving a good level of light.
The long answer to this question is yes, but for a price. To achieve a low energy lighting scheme you need to invest a substantial amount of money initially, in order to save money in the long run. The most reliable and strongest LED bulb which we have found, at the minute, which is suitable for domestic applications, is 8W. To gain the same light level that you would from a standard down lighter you would need to replace each fitting with two LED fittings. This is not affordable for the average person, or practical.
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