These are high quality anodized black metal cased 12VDC colored LED Lights. They are medium intensity so they are just right. The Actual LED bulb is 1/4″ in diameter and mounts in a 3/8″ hole. Approximately 1.25″ in depth with solder terminals.
Lamp draws 0.015 amps (15ma) at 12volts DC.
Note: There is a white mark on terminal which indicates a positive (+) connection.