150w GE Arcstream... arcstream :)

Having a look at the arcstream of one these very compact UK-made Thorn/GE Arcstream lamps.
Quite hard to get a good shot but you get the idea. There is quite a lot of thick, curved quartz close together which makes things difficult.
The discharge fills the entire top of the arc tube and it get's very hot indeed!
On shutdown the entire gas fill glows a very bright orange and the whole electrode and lead in wire assembly glow yellow hot!