Abstract: A retrofit assembly and kit provide for the retrofitting of a low-frequency T12 fluorescent light fixture with a magnetic ballast with high-efficiency high-frequency T5 fluorescent bulbs. Since the lumen output of the T5 retrofit lamp is greater than that of the equivalent T12 bulb, and typically more than desired, there is provided a dummy bulb which bridges one pair of terminals without being active as a lighting unit. The delamping link dummy bulb is provided with a bank of series-connected capacitors connected between the power pins of the pair of terminals. The dummy link may also be used to replace a T12 bulb where the lumen output of the fixture is more than desired.

Abstract: An adapter for a T12 fluorescent light fixture that is used to convert the fixture into a T5 or T8 fixture. The adapter includes a male input for receiving power supplied by the T12 ballast. The adapter has circuitry that adjusts the power supplied by the T12 ballast to parameters usable by a T5 or T8 fluorescent lamp. Also, the adapter includes a female output for outputting the usable power from the circuitry. The usable power drives the T5 or T8 fluorescent lamp.