I keep hearing that LED are more efficient than florescent. So I went around my house and pulled one of every kind of LED in use. Most were 60 to 70 lumens per volt-amp. With the most efficient one being 74 lumen per volt-amp. That's funny because my free, but not so efficient water proof high output T5 high bay lights do about 90 lumens per volt-amp. And standard output 4' T5 lamps do over 100 lumens per volt-amp and the most efficient T5, a 2' GE T5 lamp and ballast setup will do 111 lumens per watt. I haven't actually measured the 2 foot lamps power consumption my self, so their numbers, not mine. Now if you are running LEDs directly off 12v power they are probably more efficient than anything. Around half of the LED efficiency losses come from the power supply, stepping 120vac power down to 20vdc or less volts to power a series of LED chips. Now why do people go around claiming LEDs are more efficient that florescent? I mean sure, LED are more efficient than T12 and at least as efficient as T8. And assume T5 are inefficient obsolete junk when they are far more efficient than most of the LEDs sold today?