Jewel Pilot Lights

Picked these up on Ebay, 5 sets of 4 for $0.99 + $2 shipping (ie $7 dollars for 20). My idea is to stock up for when I start making pedal boards and use them as a power on indicator perhaps. They look nice but are made of plastic. The are very similar to the pilot light on my Monoprice 15 watt amp.

4 pieces,Home Theater AMPS 3V PILOT LIGHT Bulb INDICATOR,THR3 v