i think that you can't use halogen lights for growing cannabis...the spectrum of light is not the right one......the types of lights you can use are the following.....

MH:metal halide......good for vegetation....rich in blue spectrum
HPS:high pressure sodium.....good from seed to finish...good amount of blue spectrum....rich amount of orange and red spectrum for flowering
SHP-TS:high pressure sodium....extremely good for flowering.....extra rich in red and orange spectrum
UVB lights:Mercury Vapor-uvb rays are harmful and cause the plant produce more thc to protect itself during flowering
Fluorescents:Good only for vegetation-from seed till about the beginning of flowering (you can use them from start to finish but the results will be rather dissapointing)
The most practical from all lights stated above are the HPS lights as they can be used from start to finish with good all around results....they range from 70-1000watts and with one single bulb you can do your job!
With a 70 watt HPS bulp you can grow 1 plant, with a 1000 watt one you can grow around 20 or even 30 if you due sea of green......anyways, with a halogen lamp you can't grow......get yourself a 250 watt HPS....over here in a banner i see they advertise one for 80 us dollars...with this you can grow around 4 plants in an area of 0.75 sq meters=6.75sqft....that's cheap and effective......if you have any other questions don't hesitate to ask....be well
newgroweroldsmoker Reviewed by newgroweroldsmoker on . i need help on growing can u use halogen lights to gro? help me out i hella need help with this Rating: 5