I've had this ballast for quite some time. I have used it on and off over the years. Just hooked it up the other day and both Radium bulbs fired up. Yesterday I noticed one bulb fired but the other did not initially. A couple of minutes later and it fired up. Today the one side fired as usual (bottom outlet) but the top is now a no go. It won't fire at all. Looking for someone on here who might have some experience with them. Could it be just the ignitor for that side? I opened it up and there are two small round ignitors and two larger capacitors I believe. I've attached a pic. Any help would be appreciated. Thanks.