actually, if you go out and buy a reptile light they are VERY rich in UV-B light, which is what the plant needs to produce the thc more. Dont use it for more then 4 hours a day MAXIMUM! you can kill the plant with too much UV light. Mecury vapor lights arent that good, and really are only good as a compliment to others. Also flush the plants 2 weeks before harvest. This will give the plant a cleaner taste, and rich nutes. During budding be sure to use less nitrogen as more nitrogen means less THC. But that doesnt mean stop using nitrogen. Along with turning the lights off 1-2 days before harvest, and not watering for a couple days.


http://djtomatoe.tripod.com/id12.html