bmw do a clear and red one which is bright and i've seen other aftermarket units that look brake bright on normal and are almost garish when actually braking.
I've already got genuine BMW led rear indicators, bright! led bulbs in the front Bright! and replace the headlight bulbs and guess what they're extra bright.
Hence why I asked, think I'll just take my chances and get one.....
Oh and the oberon bar end indicators are something else