Someone asked me how long LED last. I read in a LinkedIn group discussion ("Hot Buttons In Lighting") that EPA is considering lowering the ENERGY STAR requirement for LED from 15,000–20,000 to 10,000 hours to lower cost, make LED and CFL equivalent, and make LED more affordable.
There are good reasons to lower the lifetime or raise it. But what do we tell people who ask? And what do you think EPA should do?
while I agree with your post for the most part, an LED luminiare
is warm ( assuming the use of DC/LEDs ) they definitely do generate
heat but having said that I would concur there are secondary economic benefits
if using LED in downlighting cans- Many of these cans were designed for
incandescent lighting and are ventilated for their role using incandescent lamps.
The excessive ventilation equates to unnecessary air infiltration when these old
cans are being used with a LED luminiares- many are or will be switched to LED use.There are
considerations about air infiltration/exfiltration issue- its a sizeable amount of waste.
As a picture is worth a thousand words I should probably of posted 2 thermal
images of a LED downlight (purpose built) vs the energy waste seen in
a thermal image of a standard incandescent down light. Its very revealing !
Really good points Joseph about the cooling energy savings and the benefit of a sealed can-light. I wonder what the equivalent leakage area of all the can lights in North America would be...
We published an article a while back in Home Energy by Bob Clear about his calculations of the heating load added by CFLs when replacing incandescent lights, compared to the electric energy savings. In very cold climates, you add more in heating load than you save in electricity by replacing incandescents with CFLs. But in the vast majority of climates, the electrical savings outweigh any added heat load. So LEDs must be a good choice even in predominantly heating climates as well as cooling ones.
Here's a new bulb for industrial applications...
No IR or UV so your art won't fade
The glacial light product is only a so- so example of 2012 era SSL luminiares -
There are many competitors with better performance - two examples the
Glacial light is not a UL approved product & they only warranty their fine
product for 8 seasons - That's a weak warranty for a purportedly well
engineered lamp- but your highlighting LEDs magazine as a bona fide
source of SSL industry developements is helpful - it's chocked full of info.
One last observation - as you stated the lack of IR & UV radiation is not
present with LED luminiares true - but why would anyone be displaying
art under industrial hi bay lighting- unless the artwork in question was
as big as an elephant - btw a bulb refers to a "lamp" with a bulbous shape
like an A19 or a B10 lamps . You plant "bulbs" you illuminate with lamps.
Ha Ha Ha! I like planting bulbs because, especially like iris, they double in a season and where you had 8 last year, now 16 are fighting for light and water! If this same thing were true with lamps, we could all plant and plan our retirements in 25 years! " "What have you got there Jonesy? " ..."Oh just a crop of cheapo Glacials next to my Crees... and my Philips will be coming up in a couple of weeks. I can't wait for that CRI of 79! WooHoo...thirty lamps to the square foot at $28 a pop, so to speak!" And I thank you, Dennis, for the lesson on the lingo. As I obviously grew up with the Edisons and we called soda "pop" and lamps "bulbs", it may take this geezer a while to adapt to the terms so I appreciate all the help I can get, and this little forum, like LEDs magazine, is helpful because of experts willing to share.