This is an early white bowl incandescent lamp made by GE-Mazda of America. It has a white enamel coating applied to the inside of the bulb. This results in the absorption of about 3% of the luminous flux from the filament, and of the remaining light about 80% is reflected upwards while the balance of 20% is transmitted downwards through the coating. Since the reflector is made of a diffuse white material, ordinary clear glass bulbs were used in preference to the more common inside frosted glass bulbs as those would not have offered any further improvement.
|Lumen Output:||3590 lm|
|Lumen Efficacy:||17.9 lm/W|
|Color Temperature:||2950 K|
|Color Rendering Index:||100|
|Factory Location:||Ohio Lamp Plant, Warren OH, http://www.lamptech.co.uk/Documents/Factory%20-%20US%20-%20Ohio.htm|
|Fabrication Date:||December 1939|
|Download:||Download this File|
|Filename:||IN R GE 125-200PS30WB-E26.jpg|
|File Size:||187 KB|
|Date added:||Oct 13, 2018|
|Dimensions:||1199 x 1598 pixels|
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