The advantage of 3W 6W 9W 12W 15W 18W 20W 24W Slim Round LED Panel Lights: 1. Complete test equipments include EMC, IES, high voltage test and integrating sphere test, etc. 2. Instant start, no flicker, no noise, no UV, no Lead. 3. Unique patent design, isolated driver, low constant current drive leds to ensure super long. 4. lifespan and low light decay.