Ballast issues ?

Heey! Im running a digilight maxibright digitalballast(400)w. Today i noticed my brand new philips hps lamp flicker.

The flickering is very small and you can barely see it i have to focus my eyes on the white wall to se it. Its minimal by other words. Im sure its not the bulb cause i change to a magnetic ballast and its normal with the same bulb.

Have anyone experienced this fenomen is my digitalballast dieing slowly? Its around 3 years old. Can it stress the plants in someway? / Flodas

It is normal for hps lamps to flicker a little bit while operating and it does not affect plants in any way. Its nothing to worry about.