G&M wrote:

The time is actually programmed in by the manufacturer. Most now use the
STMicroelectronics chip and it is easy to set this from 1 second to days.
The slower it turns on the longer the tube will last.


Well I'll be... I always wondered why they took so long to warm up;
never realised it was ramped!

Why does it affect longevity? I thought the only faliure modes were
driver failure and phosphor ageing.

--
Grunff