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Old 5th Mar 2019, 12:35 am   #10
broadgage
Nonode
 
Join Date: Jan 2010
Location: North Somerset, UK.
Posts: 2,129
Default Re: Lamps for lamp limiters

Traditionally, "traffic signal lamps" were an improved quality lamp but otherwise very similar to a regular GLS type. Often longer lasting and sometimes in odd wattages, 65 watts was very common.

Usually designed to reliably last 12 months of normal traffic signal use, remembering that they are not lit continually and are also dimmed at night which extends the life.
Long before low energy lamps became available, I used traffic signal lamps at home.
They were also used in other applications where long lamp life was paramount, aircraft warning lamps atop tall structures, navigation beacons, and the like.
They were appreciably more expensive than household GLS lamps.

These days "traffic signal bulb" is usually an inventive way to sell lamps that would otherwise be restricted.
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