Review on 🌞 Sunpark SL15T: Ultimate Electronic Multiple Fluorescent Solution by Phil Casey

The old ballast had 4 yellow wires to complete the circuit for each bulb. This made it possible to have only 1 bulb in the lamp to reduce the brightness. The new ballast has only two yellow wires. 1 to the socket of each bulb, and then you need to install a jumper between the two sockets. The lamp no longer works with only 1 bulb, you have to put 2 in the lamp.