Review on 20 Pack 5CCT 4FT LED T8 Ballast Bypass Type B Light Tube, UL/FCC Certified - 18W, 2300Lm, 3000K-6500K Selectable by Paul Koehler

I had several florescent fixtures in the house which had bulbs failing and flickering. It was very simple to remove the ballasts from the fixtures and rewire the tombstones directly. Took about 20 minutes per fixture once I figured out what I was doing. The light output is vastly improved. Literally night and day! The actual LED's are mounted on a strip inside the bulb on one side so be sure to install the bulbs so the strip is at the top against the reflector.