Crompton 40W Ruby Red "Property of HM Government" bulb
Got 3x of these this evening 

Properly made for the military application of submarine and possibly ship bridge interior lighting for night time use to preserve night vision 

They're heavier than normal bulbs due to them being handmade with actual Ruby Red glass and not some internal glazing coating method. To diffuse the light the bulb is acid etched pearl finish (internally)

Crompton 40W Ruby Red "Property of HM Government" bulb

Got 3x of these this evening

Properly made for the military application of submarine and possibly ship bridge interior lighting for night time use to preserve night vision

They're heavier than normal bulbs due to them being handmade with actual Ruby Red glass and not some internal glazing coating method. To diffuse the light the bulb is acid etched pearl finish (internally)

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