Finally got around to fitting the LED H4 bulb that Mr Gazza gifted me (as a Solstice present) into the Cibie lamp which is held into the Bosch shell with one of Mr Gazza's
adaptors. "Plug and play" in the true meaning of the words, I then nipped up the road (an unlit B road) to check it out. No measurements taken, so this is entirely subjective, but well impressed at my ability to now see where the road goes after dark. Just remains to monitor how hot it gets/long it lasts.