The schools mostly practical T8 36W fluorescent tubes If the ballast inductance ballasts, his energy consumption is 9W, if electronic ballasts, energy consumption is about 4W-5W example: If a ballast with a lamp, total power: the inductor is 45W, electrons 40W.2, photoelectric conversion efficiency of crystalline silicon solar cells on the market, the largest solar cell: 17%, component The conversion efficiency of approximately: 15% As for the hair of one hour of electricity, voltage, current, etc. depending on the purchase solar panels specifications as well as the solar light intensity.