I recently got one of those lamps that are used to check if US bills are counterfeit or not. The lamps are 6" long, and I initially though they were F4T5s, but it seems that is not the case. They are etched "Model UVF861", and their outer diameter is .6875", which is T5.5, not T5, and they have matching T5.5 end caps. However, on the bottom of the device, the sticker says "Use 8 watt type F8T6". Now these lamps are the originals as far as I am aware, and they are not T6 nor are they T5. I have yet to take current and voltage measurements of the lamps, but I assume they are dissipating more than a normal F4T5. The original ballast powering them is rated for F6T5, F8T5, and F13T5 lamps, not F4T5s. Next time I am home I will take good pictures and upload them.

They do get decently hot, is the tube bigger just because of that? Again I have yet to measure and compare specs to normal F4T5s.

Has anyone seen this before? I would think these devices are fairly common but I haven't seen any on LG.