A21 Long Life Light Bulbs by Wattage
A21 long life light bulbs are arranged here by wattage and were the original mid-range size incandescent light bulb. The special filament construction prevents failure from rough handling and vibration along with a krypton gas filling. These various improvements make an incandescent bulb that will last a very long time. You find them used in many commercial buildings, retail situations and home lighting. These are dimmable and can be used in recessed lighting, track lighting or any other place where you need to get a flexible light which has a certain kind of light you need.