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Future of LED lighting? #189237 09/25/09 05:22 PM
Joined: Oct 2002
Posts: 482
Zapped Offline OP

Work Gear for Electricians and the Trades
Re: Future of LED lighting? [Re: Zapped] #189238 09/25/09 05:36 PM
Joined: Jan 2005
Posts: 5,316
renosteinke Offline
Cat Servant
With millions in subsidies, outlawing the competition, and a lot of good luck, they will get the price of a single light bulb down to $20?

Even at todays' rates, $19.45 buys a lot of electricity.

Re: Future of LED lighting? [Re: renosteinke] #189240 09/25/09 08:46 PM
Joined: Apr 2002
Posts: 7,233
HotLine1 Offline
Thanks for the link. Interesting subject, nice to see the gov has $10 mil. for the prize!

Wonder how much the 'samples' sent to DOE cost to produce? And, how much will the street price be, IF this is the winner.

$25 for a 25k/hr bulb that uses 10 watts that saves 50 watts sure don't sound like a great ROI; I'll crunch the numbers later.

Re: Future of LED lighting? [Re: HotLine1] #189241 09/25/09 08:56 PM
Joined: Apr 2002
Posts: 7,233
HotLine1 Offline
How's this sound....
$25 cost of LED
10 watts vs. 60 watts = 50 watt savings
25,000 hours life

Savings of 1,250,000 watts over lifetime

1250 KWHr @ .13 KWHr equals savings of $162.50 or $ 6.50 year
Approx 4 year payback on LED energy efficiency only.

Sound right??

Re: Future of LED lighting? [Re: HotLine1] #189247 09/26/09 08:37 AM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
Nope! They only give out half the light claimed by the makers, so that's 8 years. But they dim exponentially to 50% of the original output and the plastic lenses go yellow - make that 14 years. In the meantime, the price of electricity doubled because of lack of baseload and cost of all those stupid windmills that never generated enough revenue to pay the capital costs of building them. Make that 28 years.
By then, all your luminaires will be obsolete! crazy

Wood work but can't!
Re: Future of LED lighting? [Re: Alan Belson] #189249 09/26/09 04:39 PM
Joined: Jul 2004
Posts: 9,569
gfretwell Online Content
Once the Vietnamese start banging these lamps out for a buck each they will make sense.

Greg Fretwell
Re: Future of LED lighting? [Re: gfretwell] #189258 09/28/09 10:09 AM
Joined: Aug 2002
Posts: 402
jdevlin Offline
If you burn them for 8 hours a day that would be 8.5 years.

Re: Future of LED lighting? [Re: jdevlin] #189259 09/28/09 11:23 AM
Joined: Oct 2002
Posts: 482
Zapped Offline OP
Perhaps a step in the right direction?

All technology goes through a bit of growing pains. Initial costs, design misfires, etc. Remember, it took quite some time for compact fluorescents to make it to the mainstream and become cost effective.

We'll see how this evolves over time...

Re: Future of LED lighting? [Re: Zapped] #189518 10/13/09 12:44 PM
Joined: Mar 2005
Posts: 1,213
SteveFehr Offline
If these are dimmable, and actually last 25 years? I'd be happy to throw away my old CFLs, just for the sheer convenience factor. I think the 10W number is generous, too; given the efficiency of LEDs, it will probably draw far less than that.

The $5 1W LED light I put in my daughter's bedroom as a night-lite paid for itself in 6 months over the 15W bulb she was using before.

Re: Future of LED lighting? [Re: SteveFehr] #189529 10/14/09 06:14 PM
Joined: Jun 2004
Posts: 1,273
Tesla Offline
Their point of introduction will be in refrigerated spaces.

Their energy efficiency impact is leveraged in the cold.

BTW, typical fluorescents stink in commercial cold spaces: too many suffer from condensation via the raceway.

A canned NTL solution with LED's on the cold side and a low voltage DC quick-connect to the power supply at the warm side would be a run-away success.

Last edited by Tesla; 10/14/09 06:14 PM.

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