Review on Sylvania 21273 Compact Fluorescent Single: Efficient Lighting Solution for any Space by Hayden Tang

This Sylvania 21137 lamp replaces the dual fluorescent lamp in a Panasonic bathroom fan. The original Panasonic lightbulbs were fantastic, instantly on and no flickering. Unfortunately, these lamps are no longer available. I have tried other similar twin tube bulbs but the flickering was terrible. This Sylvania lamp will flicker, but only 3-4 times before fully illuminating. It's not perfect, but it does the job. If I have to buy another replacement it will be this bulb - or I'll try an LED.