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Incandescent:
C
carbon
WD
drawn tungsten
WC
coiled tungsten
WM
mini tungsten
WS
pressed tung.
FG
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XL
christmas
XS
christmas sets
T
tantalum

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MA
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MS
special mercury

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SA
sockets
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You are here: Home > Top > Search Results > wc0039

wc0039  

 

wc0039.jpg
 
history and origins
 
Manufacturer / Brand Name
Philips

Country of Origin
Holland

Factory Location
Unknown

Date of Manufacture
ca.1930
 
electrical attributes
 
Voltage
240

Wattage / Candle Power
200w

Amperage

 

physical attributes
 
Envelope
4" Dia.
Atmosphere
Gas filled


Finish / Color
Cobalt Blue Glass
Filament
Tungsten

 
Base
Edison; Medium
 
 
comments
  Philips "1/2 WATT" made with cobalt blue glass. It was advertised that Philips "1/2 Watt" lamps dissipated only half a watt of electricity per candle of luminous intensity, thus the name "1/2 Watt".