ECN Forum Forums Photo Discussion Forums Photos for General Discussion Strange lightbulb

Three pin bayonets can be found on mercury vapour lamps:
http://www.lamptech.co.uk/Spec%20Sheets/Philips%20MLU300.htm

But this is more likely to be a fire glow lamp:
http://www.firstlightdirect.com/scp/Fire_Glow_Lamps/Special_Fire_Glow_Lamps.html


[This message has been edited by gideonr (edited 12-02-2006).]