Bulbs that take 0 to 15 seconds to reach ... and over 63 seconds scored poor. The Sylvania Ultra-LED 100W LED20A21/DIM/0/827 is part of the Lightbulbs test program at Consumer Reports.

Don’t worry, we know lights. Halogen, HID, and LED. We’ve delved into the ratings ... 6,500lm is still an enormous upgrade ...

Sylvania, for example ... though these kits often include only one LED bulb that fits into the original socket. LED systems typically use several bulbs arranged in a pattern to generate sufficient ...