CFLs, LEDs, and Incancescents Comparisons
I found this, with lumens being the most important for actual comparisons;
.
Power Lumens Lumens/W Color Temp CRI
.
Incandescent (rating) 40 465 11.63 2850 100
.
Incandescent (rating) 60 850 14.17 2850 100
.
Incandescent (measured) 63 850 13.49 2850 100
.
CFL (rating) 15 950 63.33 2700 82
.
CFL (measured) 13 950 73.08 2700 82
.
CFL (rating) 10 520 52.00 2700 82
.
CFL Bulb (rating) 7 318 45.43 2800 84
Then I found a chart that listed this:
Lumens-----LED-----ILB-----CFL
450----------5------40-------9
800----------8------60------13
1,100-------13------75------18
1,600-------20------100-----23
Then I found a site selling these; Earth LED ZetaLux 7 watts 538 lumens--$55 and
EvoLux 13 watts 1000 lumens---$72
They are cooler, harder to break, use a little less power per lumens, and last 5 times longer than CFLs.(50K hrs.)
However, the 40, 60, and 75 watt incandescent equivalent lumens CFLs cost only $12 for a 4 pack!!!($15 for 50K hrs.)
The CFLs use roughly 1/5th the power of incandescents, and the LEDs use roughly 1/7th the power of ILBs.(~$50 for 50K hrs.
for incandescents).
Electric use for 50K hrs @ .20 USD per KWH;
LED $80 + $55 cost=$135; CFL $130 + $15 cost=$145; and ILB $600 + $50=$650 for the 60 watt bulbs
LED $50 + $48 cost=$98; CFL $90 + $15 cost= $105; and ILB $400 + $50=$450 for the 40 watters and
LED $130 + $72 cost = $202; CFL $180 + $15 = $195; and ILB $750 + $50 = $800 for the 75 watt bulbs.
I think I'll try the LED 60 watt incandescent lumens
So the lumens per watt of LEDs has gone up since 5 years ago, and the price per lumen has dropped to a long term look of parity with CFLs over their lifetime. They are still expensive, but next time we need bulbs, I'll replace the CFLs with LEDs as we go.
A good thing to note Val is that CFL's and LED's are really close to each other in terms of lumen power, watt usage, and even cost believe it or not. Over time your going to change that cfl 5 times more than an led to 50$ for 10,000 hours or 5$ for 1,000 hours its almost the same.. But there is one quality that really really divides CFL and Led bulbs and that the fact that CFL bulbs give off a really strange electromagnetic field that is almost 100x's higher then our bodies are use to being exposed to.. they found in studies that long term exposure to CFL bulbs electromagnetic fields can cause abnormal levels in human sugar production and causes our bodies to spin out of control trying to produce sugar, which we know from diabetes can cause huge problems health wise.
I could find no evidence of your statements. The only problems were a little more eye strain with the cheapest CFLs. The extremely small amount of mercury is a "hazardous" waste in very small terms. The EMF/RF is real from all flourescents, but not a real health hazard. It must be noted that inverters from solar/wind electric systems also give off prodigious amounts of RF/EMI and the walls they are mounted on should be coated with thick aluminum foil to prevent interference with computers, phone lines, and hi fi equipment. Even the puire sine wave ones let it off.
The LED lights are not on parity cost per lumens, with CFLs. There are LED bulbs of lower lumens put off as being say 60 watt incandescent equivalent but are really not. The prices are getting closer, long term wise. However, they are still too high for equipping a solar house at a reasonable cost. We've only replaced 6 out of 36 CFLs in the past 12 years. We use the natural light type CFLs for our reading lights.
Like I said, our next multi-pack purchase of light bulbs will be LEDs of true 60 watt incandescent lumens. We still have three CFLs left new in the pack, so it may be a few years!!
Last edited by Val; 12-23-2011 at 02:28 PM. Reason: LED computer screen is giving out after 6 years.
Some years ago I bought a supply of ten-year light bulbs that use krypton gas, heavy duty filament with supports to resist vibrations, heat-resistant cement to prevent a loosening base and that base is made of brass to resist corrosion. Since then I have not had to change any light bulbs. Not one!
Last edited by nrdthxpr; 12-23-2011 at 04:56 PM.
We got a pair of LED spot lights, 3 watt, for our bathroom can lights and they were nice. We thought the cost of $30 for two was good. Until I checked ebay!!
We ended up buying four for 27.35!!! One more 3 watt, one 5 watt, one 7 watt and one 10 watt. One has a remote and buttons to change colors!!
Not bad for 50,000 hour bulbs.
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We bought 5- 2.5 watt 38LED bulbs for $12, and 2-60LED 4W for $6.81 shipped from China. They are on ebay in the US, AU, CA, and UK.
This thread reminds me of the great British comedy with Alec Guinness: "The Man In The White Suit" about a chemistry scientist who invented an indestructable cloth. But far from rewarding him, several groups wanted to kill him! The unions said "We'll only have to make one lot!" The corporate execs said they could sell only one lot, etc. In the real World, built-in obsolescence is seen as necessary. But my Krypton light bulbs will last me the rest of my life! HA!
That's a great deal!Originally Posted by Val
I've also been using LEDs, and do online shopping for them to find great deals/good discounts.
I don't know anything about the details or if this is a trustworthy product or not, but it certainly is a great idea and if there is a "wave of the future" home made energy will be part of it.
I also haven't read the info/details yet, but making use of materials that we have in our house to produce something helpful for us and the environment definitely sounds good.
jas72 was a spammer for do it yourself solar panels. That scam has been going on a while. The main profit is selling the DVD for $50. The panels, if made right, do work, but will not pass any inspections which are most often required. It was also way off topic. This is about comparing the environmental impact, costs, power consumption, lumens, and life of various light bulbs.
^ Aaarrgghhhh. Oh I see. Thanks for the heads up Val.
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