Inside this radio cabinet, where I placed the LED light stick.



The lightstick inside the radio cabinet. Note that I used some ty-raps as a strain relief near the head (the LED circuit board on this stick is thin and fragile) on the ribbon cable I used to connect the LEDs of the stick to the drive circuits (via a connector at the other end of the cable, away from the head). And the stick is at a slight angle, as the brightness was slightly higher near the LED head. Being a bit away from the dial helps make the dial lighting look a little more even top to bottom. Some of this LED light will reflect off the dial glass (this glass used to be a smart phone display) towards the dial.

If the LEDs are burned out, or if you want to stick with technology that would have existed when your tube radio was made, remove the LED module from the lightstick head, and use an incandescent bulb instead. They could have made the lightstick out of glass, and they did have clear plastic in the day. You do need to be careful that the bulb's heat doesn't melt the lightstick plastic. . .