10 Feb 2010
Thank you for your thoughtfull comments. The LED folks have done a good job of selling the "sex" of LED but the fact is that there are no silver bullets as they would have you believe. Induction lights last longer, by twice, cost less, half as much, are not adversely effected by ambient air temps above 80 degrees F (source: US Department of Energy) and produce in excess of 150 lumens per watt. LED has it's place but for roadway, parking lots and garages, warehouses, gym's or tennis courts Induction is the solution. One difference from the posting above is that todays Induction lights offer a 10 year, 100,000 hour warrenty (whichever comes first). Thats 22 years for street lights that burn only at night or 13.5 years for 24 hour opperations like parking garages.
10 Jul 2012
(1)quote:produce in excess of 150 lumens per watt quote
It will be considered good outcome if the efficiency reaches above 75lm/W, 150lm/W is absolutely not achievable. For LED, it can produce 120lm/W only at the right point below the lighting.
(2)Warranty: 10 years
Until now in 2012, no manufacturer will garrantee this long life span, the best of warranty is 5 years. 5 years is only for the induction bulb and most of the producer can only garranty 3 years for ballast. However, this does not mean the induction light can only light 5 years or 3 years, some of them may last many year longer, the only difference is that the manufacturer will not pay for the lights which does not work after 5 years.