Hello and apologies for not replying sooner, I was out on the monster enjoying the last of the good weather and avoided the www entirely.
I'm told the LED Indicator was brighter than the incandescent one still fitted when my partner was watching in his mirrors.
I bought the LEDs from
http://www.vehicle-wiring-products.eu/
I did slave in a 916 indicator internals and the LED worked fine - so going to have another check when i get the time.
regards
H