I recently upgraded the bulbs of my 7, not the headlights but all the others: indicators, stop/tails, fog and reversing lights with units from Classic Car LEDs.

All in, eight bulbs and the new relay the indicators needed, delivered (after a 5% discount code I found online) was circa £75.

Eaiest job ever, the bulbs are direct replacements for the incandescent ones. The difference is significant - much faster lighting and much brighter.

After the weather we had in Spain/Portugal, I am sure anyone behind me will appreciate the difference if we find ourselves in similar circumstances.

The parts list is here:

yes previously you were running on candle power! welcome to the LED world! Me, Uncle & Eugene have Novsight LED bulbs upfront, a snip at about £30

I fitted front sidelight bulbs, couldn't find stop/tails at stoneleigh KC show this year.
my pair of front sides cost £7 - well worth it IMO