[Greenbuilding] [BULK] Re: U.S. Energy Mark Day - LEDs

[Lawrence Lile]

If you have a LED bulb at 20 to 60 lumens per watt, compared to a CFL at
50 to 70 lumens per watt, these are both beat out by a regular linear
fluorescent you can buy at any home depot.  Any fluorescent with a
linear T-8 or T-5 bulb and an electronic ballast will be over 90 L/W and
up to 104 L/W, nearly double the efficiency.  And you won't gulp at the
cost either. 

"To save the planet, we must get rid of CFL's and replace them with
efficient T-5's and T-8's. " 

LED's will at some point overtake linear fluorescents, but that point is
not now.  Right now, commercially available LEDs are no better than
CFL's, which actually aren't very good.  There are LED's in the lab that
rate over 200 L/W, but you and I can't buy one.  

Lawrence Lile, PE, LEED AP
Project Solutions Engineering

-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Bob Korves
Sent: Sunday, March 30, 2008 10:22 PM
To: greenbuilding at listserv.repp.org
Subject: [BULK] Re: [Greenbuilding] U.S. Energy Mark Day
Importance: Low


----- Original Message ----- 
From: "Michael Smith" <michael_1234 at msn.com>
To: "greenbuilding" <greenbuilding at listserv.repp.org>
Sent: Sunday, March 30, 2008 6:44 PM
Subject: [Greenbuilding] U.S. Energy Mark Day


> Let's call it the "Mark". The idea that we will change the 4 light
bulbs 
> we use the most in our normal day as it pertains to a week. That is,
if 
> you leave your garage lights on all day until you get home, that's one

> light to change.
>  Change it to a 50,000 or 100,000 hour LED light that uses 80-90% less

> energy than the incandescent, fluorescent or halogen you use now.
They're 
> expensive! Why would you spend $40.00 on one light bulb much less 4? 
> Because your government just gave you back $1200.00 and I want you to
do 2 
> things. Turn that $40.00x4 into $160.00 every year in savings. And,
show 
> the government they have their heads up their you know what.
But....that 
> will show the whole world we can change habits more in one month... 
> forever....than some world fund do-gooders can do with someone else's 
> donations.
> Do some research on cost over the life of the bulb and see what I
mean. 
> Let's make a real change right now without giving up any life style.
+++++++++++++++++++++++++++++++++++++

Hi Michael,
Here is a post that I recently sent to another group:
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