The light bulb of the pilot light on my Perreaux SM3 was broken when I bought it. As far as I can tell the bulb is 5mm. The voltage leading to the lamp measures 42.4v. Any idea what lamp I should go for?
and a bit of heatshrink to avoid shorts but probably best not to cover the resistor body.
White or blue LED.
The LED will not need its full rated current for an indicator lamp.
Check the resistor dissipation - 42V is a lot to drop.