Actually I have a stream light Green Trident ( http://www.brightguy.com/products/Streamlight_Green_Trident.php ) I've been using for work for quite awhile (not very bright) and I usually go through 2 sets or rechargeables per day (At work the headlamps stay on almost all the time). Last night I tried out the Spider-fire on the high reach for the whole night (lower 50 degrees with heavy wind at 60 foot up in the air). It went from 12 am to 4 am on the highest settings before swapping out the next set of rechargeables. I must say the light is impressive and is really nice to work with at night. I had several workers are interested in getting them as well and I dropped it a few times but only 4 feet with no problems. We compared it against a true 3 watt steam light and the stream light was a little brighter but it is way brighter than my primary light Stream light Twin-Task 3C LASER ( http://www.brightguy.com/products/Streamlight_Twin-Task_3C_LASER.php ). I have yet to find a light that can do all the functions this light can do (Stream light Twin-Task 3C LASER) and take 3 to 4 story drops on concrete constantly. So far I've been impressed with the light, I'm going to start to run it hard this next week and if it holds up I may get one for the house.