Girard Sudron Lamp Glass 45 mm diameter Total Length 70 mm 240 volt rated. This is a Halogen Capsule Enclosed in a Glass Globe. 

THIS LAMP IS HAS BRIGHT AS A 24 WATT Incandscent BUT not as HOT!

This Lamp is made by Girard Sudron Top makers of lighting Since 1894 so they may know a bit!

210 Lumens

This Lamp has 2,000 hr avg life more than normal

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by a length of wide tape marked FRAGILE.