A 12V 24W SBC bulb in a metal socket mounted on a folded metal base 100×63mm approx. with a pair of 4mm sockets. The power rating of the bulb has been chosen so that when it is placed in front of the solar cell, sufficient power is produced to run the motor effectively whilst avoiding the risk of damage to cell by excess light and/or heat.
Home/PHYSICS/MOTION ENERGY & POWER TRANSMISSION/PHY-MEPT-11 ENERGY TRANSFER APPARATUS (MALVERN)(MOUNTED LAMP 12V 24W)