Lose the Mercury Vapor. It's all wrong for cannabis.
Cool white tube flouros or CFLs will give you the blue light that cannabis wants during veg.
HPS isn't the most efficient use of electricity until you get to flower, when the plant wants that nice red light.
stinkyattic Reviewed by stinkyattic on . HPS LIGHT FOR VEGGING???? i just went out and bought a 50 watt hps light and fixture im gonna get another but my question is can i use a hps light for vegging and flowering i konw i can use for flowering just not vegging i also wanted to know if you can use a mercury vapor bulb/fixture for vegging please if i can would love two add it to the grow area!!!! Rating: 5