is there some one who knows about uvb lighting, as i was told by a man who breeds ackies, that the mercury vapor bulbs you see in street lights and the ones for plant growing give off uvb at a good rate. i use the activeheat bulbs which are very good, but very expencive £50. so all they are is a mercury vapor bulb, so what is the dif if any between the two. i know the first one gives of uvb as they warn you about it. i want to know how much they give off. thankyou for your time and help.

cheers danny.