Led Lighting

[bedokbetta 0]

I am currently planning the lighting for my new house, and was heavily influenced by the claims of energy savings (never mind set-up cost for now) of LEDs. The original intent is to use LED lighting in the entire house and do away with fluorescent altogether. Since then I have been doing a lot of research into this and what I thought it was not very feasible.

Initial Impression: LED is energy efficient as compared to all other forms of artficial lighting.

My current understanding: As a point source of light, LEDS is indeed without equal. I am comparing it with incandescent bulbs or halides type of lighting commonly used in downlights. So, if we are talking about illuminating a specific area only, such as a study table, LED is indeed the choice where energy savings are concerned. My conflict comes when we want to illuminate an entire room. A he T5 fluorescent currently gives about 100lumens/watt. Thos LEDs that I saw in lighting shops that I visited are 80lumens/watt or below, most being in the 60+ range. Hence current conclusion is that one should still go for flurescent if he wants to save energy.

Am I interpreting the situation correctly, or am I missing something?

[pckee 2]

I am currently planning the lighting for my new house, and was heavily influenced by the claims of energy savings (never mind set-up cost for now) of LEDs. The original intent is to use LED lighting in the entire house and do away with fluorescent altogether. Since then I have been doing a lot of research into this and what I thought it was not very feasible.

Initial Impression: LED is energy efficient as compared to all other forms of artficial lighting.

My current understanding: As a point source of light, LEDS is indeed without equal. I am comparing it with incandescent bulbs or halides type of lighting commonly used in downlights. So, if we are talking about illuminating a specific area only, such as a study table, LED is indeed the choice where energy savings are concerned. My conflict comes when we want to illuminate an entire room. A he T5 fluorescent currently gives about 100lumens/watt. Thos LEDs that I saw in lighting shops that I visited are 80lumens/watt or below, most being in the 60+ range. Hence current conclusion is that one should still go for flurescent if he wants to save energy.

Am I interpreting the situation correctly, or am I missing something?

Base on my understanding, yes, LED is more energy saving. But this statement only apply to companies or factory at this moment as the cost of LED is still high.

For factory and office, they on the light at least 8hours a day. If they change it to LED, they will save money on the electricity. For home use, the saving is not that significant.

[dong 0]

LED Fluorescent tube are way too expensive for the change now. Also it really depends on your lighting application, for example, indirect lighting - fluorescent tube installed inside the cove, this case, the normal T5 or T8 fluorescent tube will work much better. Reason is fluorescent lighting gives out uni-directional light distribution, and it will greatly enhance the lighting behaviour on cove lighting. Wherelse LED is directional, and the max beam angle is 120 degree....compare to our normal fluorescent which is 360 degree.

LED provides 100 lumen per watt only on raw data.....that is the bare LED tested in a PERFECTLY CONDITIONED Lab, and is tested by passing a current through the LED in a split of seconds, while the computer capture the lighting intensity and make claim. However when LED are being fitted on the luminaire (Light fitting) and being use for the REAL WORLD application, there are so many factors to consider that can affect the lumen depreciation like Heat, Optic Lens, diffuser etc, i would safety say the ACTUAL delivered lumen will be in the range of 40 - 60 lumens. NEVER trust "cowboys" LED lighting company when they tell you their LED is 100 lumen / Watt or higher. The World's largest lighting manufacturer - PHILIPS and OSRAM also never claim their LED product to be over 70 lumen / Watt. (Complete package Products).

Cheers

[limwsv 0]

A lot of F.U.D in the marketpalce right now, depending on who you talk to and what they have and selling.

I am doing my own reasearch and doing to vpost a couple to test it out.

See here.

http://www.eternaleds.com/