Satco S2850 50 Watt R20 Incandescent 120 Volt Medium Base Light Bulb, Blue

The Basic Design Of The Incandescent Lamp Has Not Changed Much Since The Late 1800S, When Thomas Alva Edison Successfully Produced The Fist Operational Electric Light Bulb. The Filament Inside An Incandescent Lamp Must Be Protected So That Oxygen Does Not Reach It And Cause It To Evaporate On Contact. Most Incandescent Lamps Are Either Vacuum-Sealed Or Gas-Filled. Incandescent Lamp Filaments Are Made Of Tungsten. Tungsten Is A Metal That Can Operate At Very High Temperatures Without Evaporating Too Quickly An Resulting In Early Lamp Failure. Incandescent Filaments Only Convert About 10 Percent Of The Energy Used Into Visible Light, So It Is Necessary To Use A Material That Can Withstand Extremely High Temperatures. Most Lamps Use A Coiled Filament Design, Which Has Been Found To Be Stronger And Deliver Better Performance.

Features of Satco S2850 50 Watt R20 Incandescent 120 Volt Medium Base Light Bulb, Blue

2000 Average Rated Hours | 50-Watt Medium Base | Blue R20 Bulb | Model Number: S2850

Specification of Satco S2850 50 Watt R20 Incandescent 120 Volt Medium Base Light Bulb, Blue

Product Details
Color	Blue
Size	2.5 x 2.5 x 4 inch
Dimensions	2.5X2.5X4
Weight	0.1