Hi all, some years ago (7-8) one of MH CDM lamps i ordered arrived with external glass broken (but intact tube), i kept it.
It is an 150W Philips master cdm G12 lamp.
Due this period, i was wondering if is it advisable run with broken external glass to produce UVC and ozone.
I was wondering about run with 70W magnetic ballast to stuck it with only mercury emission in protected luminarie (otherwise, i will use an 150w ballast).

The UV emission is similar to other discharges
The problem will come mainly from the arctube seals being exposed to oxygen, the ceramic ones are even more sensitive than the quartz ones.

Thank you Medved for the info!