ok any watts is good
but anything over 65 k is good
um it didnt shatter. but there is a crack in it bout 2 cm long . i dont know though they guy at the hydroponic people said that its screwed.hrrmmm so was there a warenty ? if not it still good . how much does a bulb run for >?
does anyone here in town have a 175 watt pulse star ballast that i could try it on to see if it is a pulse starter