umm id say the lights are about six inches to a foot away, i been looking for a good fan to use but i cant come across one small enough. i am useing one 100 watt regular bulb, and another 150 watt bulb a friend bought from a nersery. . .he said it was some kind of grow bulb, im looking into HPS bulbs and my buddys got one but the bulb wouldent fit in any regular lamp, i was woundering also if you can buy a high pressure sodium bulb that would fit in a regular household lamp??