We tested the low-beam performance of single-filament (9003) and dual-filament (H7) bulbs from GE, Hella, Philips, and Sylvania, and PIAA's dual-filament bulb. We also compared their performance ...
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What Are CFL Bulbs? Everything to Know
Because CFLs use less energy than ... Incandescent bulbs produce light by generating heat. Electricity is forced through a ...