Not wanting to appear a Barrack Room Lawyer .... but the OPs reproduced rule refers specificaly to changing a halogen light to a LED light .... the Lucas P700 Tripod repos on ebay can be bought new with either the halogen or LED bulbs .... if you bought the LED version you wouldn't be converting the lamp unit .... it would have been an LED light unit from new .... might be wise to keep the reciept in case of a query at MOT time though.
K
