I have an old UV exposure box that uses 2 x T5 bulbs in series that stopped working. I got replacement bulbs and starters but to no avail.(it uses 2 Sylvania F8W/T5/BL350)
The ballast in the unit has no markings on it.
I have an old unused ballast marked 40W - 1,2m lamp HPF use 3.5uF - Class...