As per the above- we don't have mot's so more concerned with available light- I was thinking of putting either rally bulbs or a hid kit in the outer, and just using the inner for an air feed- the reflector on the inside lights of mine have gone hence the question

 

Avoid the HID kits for H4, thee is a long thread running elsewhere which is worth a read.

Uprated bulbs or rally bulbs may be the answer, but be careful, they are NOT all equal, some that cost lots aren't worth the money.

Here you go: https://www.scoobynet.com/scoobynet-...s-on-hids.html

 

The Philips rally bulbs seem to be one of the best rated, so was going to try this first- if they arent bright enough will go back to standard, but thanks for replying

 

Philips, Osram Nightbreakers, there are some out there rated at 100% uprated.
Halfords 90% uprated got a good write up last year, made by GE, they are usually BOGOF in winter.