Not shure but i think it stands for high power sodium and i got mine off the internet it was about 80 pound which is 120 euros or 120 dollars for 600w just try to find a grow shop in your area or in your country with google and order online thats what i did.
magic bud Reviewed by magic bud on . help guys i have a 3 month old plant i just got a soft white 150 watt spiral light bulb with a 2900lumens out put is that enough for a succsesful grow its 14 inches high and can i start the 12/12 now if i wanted Rating: 5