All vegetative and growth stages: 5500K
Flowering: 2700K

Grow with Hortilux Bulbs from beginning to end and never worry about the Kelvin again.
HARDDON Reviewed by HARDDON on . What spectrum of cfl is best? I'm looking to replace my hps system with a much less hot cfl system. What "kelvin" amount is best for veg/flower stage? I've been searching for awhile but I don't see anyone specify which spectrum is best. I know that this is an important factor so if you have any information I'd really appreciate it. Thanks. Rating: 5