[Greenbuilding] [BULK] High Eff fluorescent Fixtures??

[David Bergman]

At 09:31 AM 3/30/2007, Lawrence Lile wrote:
>The LED downlights I am speccing right now have a big heatsink on the
>top to get rid of the extra heat.

I've wondered about this. How can a lightsource be efficient when it 
is creating so much waste heat?

>They aren't much better than 20
>lumens per watt.  You hear a lot of hype about LED's, but the products
>out there in the field are not catching up with the hype.  Your Mileage
>May Vary.

Yes, there's hype and the current ones are low efficacy, but I do 
think they are catching up with the hype. Each iteration of LED and 
lighting trade shows has improved products out there. Our lighting 
organization here in NYC (DLFNY.org) has sponsored a couple of LED 
mini-trade shows and we are actively thinking of doing them annually 
because of the rapid developments.

My current assessment (and others') is that they are very useful and 
efficient for specialty situations and display lighting. They are 
almost -- but not quite -- viable for fixtures like recessed cans 
because they max out at around 60 watt equivalent.

I'm using them in a demonstration green kitchen installation for 
undercabinet and cove lighting. They're still more expensive than 
halogen or fluorescent equivalents, but I expect that within a couple 
of years that will change.

I'll try to post a report after LightFair in May.

David

DAVID BERGMAN ARCHITECT / FIRE & WATER LIGHTING + FURNITURE
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