How old are they? Sprouts, when you say that, exactly how young? Just keep an eye on them and they will tell you if it's too much.
You have a good idea with using the 150, some will say never to use a HPS because it is not the blue spectrum, but it may pleas you never the less, and if it is what you have then it is what you should use IMO.
Adieu
BlueBear Reviewed by BlueBear on . 8 sprouts under 150w hps? I dont really want to go out and buy a bunch more cfl's, so I was going to transplant them to bigger pots on Sunday then place them under a 150w hps but have the light about 20" or less above the sprouts. I am using BC's starter kit and some superthrive which I will add to the water when I transplant. Soil pH is 5.8-6.2. Its alittle orangish on the top so I plan on having a higher pH when I water. Rating: 5