ok well hps is high pressure sodium a very great loght for growing although it raises electricity and needs a ballast they also get really hot cfls are compact florecent lights which are those little spiral lights that will grow weed fine just need to be closer to the plant and also you gotta kae sure u get right spectrum for each stage like 6500k or daylight type for veg and 2700k or soft white for flower
green_gardenr Reviewed by green_gardenr on . well winters here and i want to grow still so im thinking about growing in the space under my staircase. i've got a spare clamp lamp that i use for my lizards. Now i've heard about "cfl" and hps" lighting... but i have no idea what this stuff is. could anybody give me some info on what kind of a bulb i need to buy for a standard grow, and where i could buy it? i hope this is a reasonable question to be asking thanks:) Rating: 5