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#189237 - 09/25/09 03:22 PM Future of LED lighting?
Zapped Offline
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Registered: 10/01/02
Posts: 482
Loc: Huntington Beach, CA, USA
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#189238 - 09/25/09 03:36 PM Re: Future of LED lighting? [Re: Zapped]
renosteinke Offline
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Registered: 01/22/05
Posts: 5316
Loc: Blue Collar Country
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.
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#189240 - 09/25/09 06:46 PM Re: Future of LED lighting? [Re: renosteinke]
HotLine1 Offline


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Registered: 04/03/02
Posts: 6778
Loc: Brick, NJ USA
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.
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#189241 - 09/25/09 06:56 PM Re: Future of LED lighting? [Re: HotLine1]
HotLine1 Offline


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Registered: 04/03/02
Posts: 6778
Loc: Brick, NJ USA
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??
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#189247 - 09/26/09 06:37 AM Re: Future of LED lighting? [Re: HotLine1]
Alan Belson Offline
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Registered: 03/23/05
Posts: 1803
Loc: Mayenne N. France
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
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#189249 - 09/26/09 02:39 PM Re: Future of LED lighting? [Re: Alan Belson]
gfretwell Offline


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Registered: 07/20/04
Posts: 9039
Loc: Estero,Fl,usa
Once the Vietnamese start banging these lamps out for a buck each they will make sense.
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#189258 - 09/28/09 08:09 AM Re: Future of LED lighting? [Re: gfretwell]
jdevlin Offline
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Registered: 08/07/02
Posts: 402
Loc: welland ontario canada
If you burn them for 8 hours a day that would be 8.5 years.
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#189259 - 09/28/09 09:23 AM Re: Future of LED lighting? [Re: jdevlin]
Zapped Offline
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Registered: 10/01/02
Posts: 482
Loc: Huntington Beach, CA, USA
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...
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#189518 - 10/13/09 10:44 AM Re: Future of LED lighting? [Re: Zapped]
SteveFehr Offline
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Registered: 03/19/05
Posts: 1195
Loc: Chesapeake, VA
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.
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#189529 - 10/14/09 04:14 PM Re: Future of LED lighting? [Re: SteveFehr]
Tesla Offline
Member
Registered: 06/16/04
Posts: 1273
Loc: Sacramento, CA
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.


Edited by Tesla (10/14/09 04:14 PM)
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