[dseymo1]

Originally Posted by jamezx88

You are absolutely right re: speaker wiring causing the overheating. Disconnected one part and it stayed cool for a few hours. Will re-connect using the instructions above.

Re: light bulb. Would these do?

https://www.ebay.com.au/itm/6v-Festo...0AAOSwt5hYicnM

Or these?

https://www.ebay.com.au/itm/6v-Festo....c100005.m1851

Would also be happy to change to LED strip if not too complicated? I think I have one lying around somewhere

No, they would be too bright, might get hot enough to cause damage, and would probably overload the power supply.
If you're not looking for originality, LEDs are the way to go.