I have a row of fluorescent fittings under the kitchen wall cupboards - all fed from a fused spur at one end. One of the fittings (near the end of the run) has failed and I've bought a replacement but unlike the existing fittings, the replacement requires an earth connection. The existing fittings are all linked by two core wire and plugs from fitting to fitting so putting in three core all the way along from the fused spur would be a bit of a pain. On the other hand the new fitting will be situated near the extractor hood for the cooker, which has an earth connection. Would it be in order to leave in the two core all the way along and simply add a single core earth wire from the earth on the hood (less than a metre)? The earth connection to the T5 appears to be needed for kicking the startup (metal band along the length of the tube) rather than for safety purposes because the fitting is largely plastic.