Continued from my "good review" post about led tubes, here is a long post about bad bulbs. I'm hoping someone would take the time to check data led sheet and math. I have some 25W, 30W, 40W, and 50W versions of these cheap corn bulbs. They are for sale all over the web. I'll stick with the 50W for now. All seem under powered. It is listed as 165 X 5730smd, 50 watt, and 4800-lm. Power: 5W,10W,12W,15W,25W,30W,40W,50W Lumen: 450-4800lm From my understanding, this makes sense. 5730 are .5 watt. Lumen also seem possible.