This review is for the 4' 32W 5000K bulb with a single strip of LEDs and a clear cover.They work. Bypassing (removing) the old fluorescent ballast is straight forward.I strongly prefer the dual-end wiring (like these) where one end of the fixture is line-hot, and the other end is line-neutral. It also happens to be the easiest way to rewire the fixtures I have.These are the only 32W lamps I've run across, and they are delightfully bright. Much brighter than the common 18-22W LEDs or the 32W fluorescents they are replacing.They are a little flimsier, both the plastic shell and the aluminum back, than other LEDs I've used, and they weigh about 20% less. I don't see this as a problem though as they're only getting installed once, not being roughly handled many times. I'm pretty sure my UPS driver could cheerfully fold a package of one or two of these in half, but the tightly boxed 12-pack was plenty sturdy enough to withstand him.They only come with a clear lens, if they came frosted I'd recommend that. Even with a pebble/prism diffuser they're bright enough to have a little glare. I wouldn't want them in an uncovered shop light.I'd really like it if they came in a 4000K frosted model, but I'll happily go with 5000k clear to get the extra light offered.Great LED lamps for retrofitting old fluorescent fixtures!