Personally I only veg with floros. There is nothing an MH can do that good CFL's cannot do during veg. The MH may be easier to work with than CFLs.

But for lvegging purposes, for me its CFL all they way.

Any light you have, CFL, MH or HPS, when used with a reflector is a heat hazzard. You can mitigate the hazzard with suction, forced fan action, kool tubes, glass, etc...

If you have a small area you are growing in, dont use reflectors.

You would be shocked to learn how many grows are killed because of heat alone.

I too, have been the clown that fried his fields with heat.

For 4 plants, definately go with the 400W over the 250W.

I am sorry but I do not know the temps of MH vs. HPS...although I can assure you that 250W of MH light is 'hotter' than 250W of HPS.

At least thats what my arms, fingers, wrists and head can testify to after all the learning I had to do
HARDDON Reviewed by HARDDON on . how many days does it take for a seed to sprout i germinated four seeds for 6 days inside a moist paper towel but no root came out in the six days. So i was getting impatient and took two seeds and planted them about 1/4" below the dirt. I got two CFL's on each and was wondering about how long it will take for them to come out of the dirt. The other two seeds are still germinating and i'm going to wait for a tail on them to plant them. so does anyone know how long it should take? Rating: 5