When it's inadvisable to reset lamp timer

[mikro]

Is it true that resetting the lamp timer/life to zero and continuing to use an old bulb can damage the ballast or power supply?

[Jake]

YUP :D

The reason for that is because...there's an average hours of usage for the lamp. Now if you try to squeeze more hours to a lamp, basically you're forcing the life spawn of the lamp, making your ballast to work the double to ignite the lamp/ keep powered on.

[Resist58]

How does resetting the lamp hours try to extend the lamps life? It's just a timer, lamps die when they burn out not because the timer extends their life in some way.

[fil29]

The timer is only to let you know how long your lamp as been running .The average life of a lamp is between 4500 and 6000hrs . So you can bye another one spare before it ran out.