They could buy a hps conversion bulb at a very reasonable price, use "warm" cfls/flouros to suppliment, or just go with the MH.

For most strains, the light time is the main factor, light temp changes just help out a lot. It would definately be worth his time to make the light more red in some way though.
achilles Reviewed by achilles on . mh light for flowering??? my friend has a mh ligh. can this person use this light from start to finish? or should he/she purchase a hps with an adapter to flower. part 2 if they choose to use the mh to flower will it effect the quality???? Rating: 5