im not sure about all the different lamps out there but i use one like this and it has red and blue spec so i can do veg and flower

http://www.basementlighting.com/Merc...tegory_Code=GL
sc0usa Reviewed by sc0usa on . Question about HPS and MH I know that MH bulbs has a blue frequency for vegging and HPS has a red frequency for blooming. But which will the a better bulb for the entire growth process? which will produce better yields when used during the whole growth process? What bulb is in this picture? MH or HPS? I think its MH cus the light is kinda blue. Rating: 5