Quote Originally Posted by Simon Barden View Post
I know this is in the UK but here are a number of different coloured jewel lights to fit a standard Fender bulb holder along with a 230/240v bulb:

https://www.hotroxuk.com/amplifier-p...el-7475-0.html

Or maybe you want something very different? However I'd expect most jewel lights are threaded to screw into that standard bulb holder.
There are both metric and imperial threaded lamp holders, so you obviously need the appropriately threaded jewel.
I can't remember what the diameter and thread count is for the imperial (Fender) ones now. It's been many years since I dealt with the lamps and jewels.

A lot of modern amps have switched to LED now. Which is kind of sad, but I guess the way of "progress".
I know they'll use an LED that changes colour to discern between stand-by and on.
NOT that you want an LED on a vintage-style hand-wired amp!!! I was just pointing it out...