LED Industrial Lighting: Common Myths and Facts

Very interesting and highly informative.

Using LED; need S/P meter to verify and validate the visual effects of any given application with LED.

Just starting to investigate options. Sounds good.

The payback numbers are very misleading and incorrect. You are saying that you will replace a 6-lamp fluorescent fixture that uses approx. 228 watts (32 watts per lamp plus ballasts) with an LED Light Engine that outputs 13,000 lumens - even at 130 lumens/watt plus power supply this must use at least 105 watts. So on a fixture per fixture basis, the reduction is only 54%. Your chart shows an 84% reduction. This can only occur if there is an entirely different duty cycle - if for example you assume the fluorescents operate 12 hours per day while the LEDs operate for only 4 hours. While there may be such reductions possible with occupancy sensors and other adaptive controls, that is not explained in the comparison (other than a reference to a 20% occupancy which is unclear in meaning). LEDs can save a lot - but over-exaggerating and over-selling the benefits will hamper - not accelerate - their adoption. Be more clear about how your comparisons are done.