what is the difference between "plants High Pressure Sodium" and normal "High Pressure Sodium"? cause the prices deffers from 20 US$ to 60 US$
little to no difference. I wasted $80 on a Eye Hortilux 400 hps bulb. I added another 400w reflector to my grow space and purchased a $20 Philips hps 400 from H Depot for that one. at harvest, same results for both bulbs. same bud quality and weight. grew 2 clones of the same strain under each bulb. when they are fired up, the brightness. color etc looked exactly the same. save your cash and get the cheaper one. linedrivr