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Old 21st Jan 2023, 2:58 pm   #2
broadgage
Nonode
 
Join Date: Jan 2010
Location: North Somerset, UK.
Posts: 2,129
Default Re: Unusual light bulbs

The frosted MES bulbs used to be more common but are no longer readily available AFAIK. They had two main uses, firstly for minimal room lighting in premises without mains electricity, and secondly to light microscopes or other instruments.

The flat topped opal backed MES bulbs also used to be popular but are also no longer readily available. Used in small torches without a reflector, and also in wall mounted lights that used a type 800 cycle lamp battery. Useful fitted just inside the front door of houses without electric lights, or in dark areas.
Also fitted next to the fuse box in places with electricity. Some designs had a compartment to hold matches, fusewire or other items. Used in the war to light air raid shelters.

Nothing that unusual about the red coated bulb, most lamp makers offered superficially coated miniature lamps for a slight extra cost. Many applications, including Christmas lights.

Not seen a part coated lamp like the green one. Possibly done by the end user for some special need.
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