Re: LED bulb conundrum.
All kinds of bulbs usually surge when you first turn them on.
Halogen bulbs have no resistance when they are first turned on, hence the surge, the halogen filaments gain resistance as they heat up.
LED's always induce a constant load on the supply, so no surge, but the transformer may have circuitry to prevent the sudden surge of the halogen bulbs damaging the transformer, and so limits the initial start up ...If the startup is limited by a charging capacitor, once you have energised it with the first switch on, with the capacitor now charged, a second attempt will be successful. If the circuit is left for a few minutes the capacitor will have now discharged, and the double switching procedure must be followed again....hope this helps Longdogs....
Or what Judd said......