Review on EcoSmart Daylight Energy Dimmable Industrial Electrical Lighting Components by Tammy Finucci

They are incredibly bright and are listed in lumens which seems to be accurate. I've used about 20 of these around my house and have little to no complaints. The only problem I've ever had was with the dimmer: sometimes when the dimmer is on the lowest setting and you've flipped the switch to "off" you can see 1 bulb stays off after you turn it on . It turns on when you turn up the brightness and stays on no matter how dark you make it. I'm assuming it's a voltage issue in the lamp, but that's a minor complaint.