Good I've tried all types of black light. Fluorescent, LED, whatever. If you want REAL black light, fluorescent tubes are the ONLY option. I have both LEDs and Fluorescents and the UV sensitive colors of Fluorescents are MUCH BRIGHTER than LEDs compared to the wattage. You get MORE traditional LED lighting, more "purple" light, but NO true BLACK light. There is one big difference. The displayed LEDs are brighter. Yes, that's right. However, it does not illuminate UV-sensitive objects as brightly as fluorescent tubes. Period. The combination of LEDs and fluorescent lights is pretty ugly.