04-16-2015, 03:37 PM
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#11 (permalink)
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Master EcoModder
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Doubt my lights are on an average of 5% of the time, just say 10% so numbers are easier, $13.82 vs. $3 vs. $1.40/month would be closer.
CFL save $10 a month and could recover bulb cost in 2-3 months.
LED vs CFL save $1.60 a month, a years saving covers one LED bulb.
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04-21-2015, 02:38 PM
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#12 (permalink)
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home of the odd vehicles
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I bought a dozen 14 watt CFLs at goodwill last week for $0.10 each!
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04-21-2015, 05:25 PM
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#13 (permalink)
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EcoModding Lurker
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Dang, that's a sweet deal.
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04-21-2015, 07:16 PM
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#14 (permalink)
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home of the odd vehicles
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Quote:
Originally Posted by KFM
Dang, that's a sweet deal.
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You can buy single or multipack CFLs at Dollar Tree all day long for the wonderfull price of exactly $1 (seasonal availability applies)
I won't say they are the most efficient or the best quality but hard to beat. |
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04-21-2015, 08:27 PM
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#15 (permalink)
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THD has dozens of 9.5W (60W replacement) LEDs on sale right now for under $5. Still not as good as the typical CFL price, but way better than the typical LED price. If anybody was interested, I could pick some up and ship them out.
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04-22-2015, 01:17 AM
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#16 (permalink)
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You have to look at the amortized million lumen hour cost and not the unit cost. Incandescent bulbs are cheap to buy but run to $7.50 per MLH. CFC'S run $2 to 4 per MLH. LED can run as high as $5 per MLH. Not hard to see the bargains here. You just need to know how to calculate the MLH cost.
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04-22-2015, 01:29 AM
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#17 (permalink)
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Quote:
Originally Posted by aerostealth
CFC'S run $2 to 4 per MLH. LED can run as high as $5 per MLH.
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OTOH, LEDs give a much better quality light (for my tastes, anyway). Much closer to natural daylight. |
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04-22-2015, 02:15 AM
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#18 (permalink)
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No idea what OTOH means? Color temperature is what you are talking about. I like 3,000 K to 3,500 K output. True daylight would be well over 5,000 K which is too blue shifted for me. The lower temployee is considered warm and the higher temps are considered cool.
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04-22-2015, 03:28 AM
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#19 (permalink)
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Master EcoWalker
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OTOH means On The Other Hand, IIRC... 
It is not just the color 'warmth' (the K grade) but also the spectral components of the light that matter.
By design LED light is hard blue (at least, the most efficient type is) so it needs a coating of fluorescent material to produce other colors.
Likewise, a CFL tube needs a fluorescent inner coating to produce a mix of colors that shows white.
Which of these produces the most natural mix depends on the quality and design of the fluorescent coating used, more than the type.
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04-22-2015, 05:45 AM
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#20 (permalink)
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Are LEDs expensive? Considering Philips is about to launch an 8.5w bulb that's as cheap as some of the 4w Chinese bulbs I've bought over the years... I don't think they'll be "expensive" for much longer... 
LEDs are a bunch of diodes, a circuit board and electronics. That's always going to cost more to assemble than a single wire sitting inside a vacuumed-out glass ball.
I love LEDs. Have had color issues with the cheap ones, so I'm currently switching to white. I tend to buy bulbs that are coated... so technically less output per watt, but they aren't eye-searing to look at... and are still more efficient than CFLs.
Since I started installing them three years ago, I've only had one go out... and that one was in an outdoor socket exposed to potential water contamination from rain.
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