I picked up a GE F15T8 direct swap LED bulb for my son's RFM pinball last week and it really made the backglass/translight pop! Then I looked at the S-2000 and it looked sad. Not knowing any better I went and got three more for it. I don't recall seeing anything posted here but... they didn't work. From some Googling it appears that they require a minimum of 55V and in this case I'd need a "marine" bulb as the ballast is only putting out 24V. Is this correct? We did measure 24V to the input side of the ballast. I'd always expected 120V for a florescent.
The bulbs worked just fine in the S+ so at least that money wasn't wasted (a little too bright for the above reel light though).
Attached is a pic of the ballast. I wasn't aware that there is a difference. I thought that a "F15T8" would be the same as both specified 15W on the bulb itself. Looking at my GK belly light I see it has the same ballast. Is there a recommended replacement bulb or should I just look for 24V LED strips, wrap the original bulb and tap off the ballast input wiring directly?