Many growers use this method, and I've never heard of any maladies (like hermaphrodites) becoming of them. Reason being, like most annuals, cannabis is a fairly tolerant plant when it comes to the amount of light it receives.

Some growers attest that the extra hour of light helps to produce more THC laden trichomes, but I haven't read of any extensive studies that prove this to be conclusive.

If it works for you, grow with it! :rastasmoke: