some advice please. we installed a warehouse full of T bays. 4 x 28 watt T5 tubes. this was about 2 years ago. a lot of tubes need replacing but the T5 lampholders are given me problems . the lamps wont turn. the little black inserts that guide the pins are all seized. these are expensive fittings so shouldnt be giving problems.
what can i spray on the lampholders to lube it. silicone spray? i dont think it is flammable.