While I was in Pasar Road, I decided to get some of these Neon Indicators. There are a few sizes but I think these are the ones which might suit the Haslab Proton Pack. A moment of though: Why do I need to get these even though I know I am not going to open the Cyclotron?
STEP 1: BREAKING OPEN THE BASE
STEP2: BASE CONSTRUCTION
STEP3: LIGHT TESTING
These indicators would look great if paired with the appropriate colours but they, to me, would not look authentic. Plus, the clear plastic colours can be easily overpowered with LEDs of different colours. The neon bulb gives off an orange-ish light. So, to be more or less accurate, I would need 3mm orange LED with clear lens. But I would very much prefer a warm-white LED which is more towards yellow tint.