[frenchelectrican]

Also what more with some of the T-12 ballast will not run 48" 25 watt bulbs at all { I have see this more than once in both USA and France side }( some 34 watters may not work with some T-12 ballast as well especally on cool days or have A/C blowing on the bulbs that can compound it )

Double check the label on ballast to make sure you are using proper bulb it will make a big differnce on operation.

Merci,
Marc