GE 400w Multi-Vapor MBI-F: Full Power

Just a quick shot of this US-made 400w GE Multi-Vapor MVR400/C/VBU/40 metal halide lamp on test at full power.
This is quite heavily used with a darkened discharge tube but it still seems to have plenty of life left in it.
It still seems quite bright and the colour is quite nice too with no trace of any colour shift.
Fires up quite nicely on a standard 400w MBF choke and an SI51 parallel ignitor.

40,000lm
20,000h
3700k
CRi 65%