Hello John,
Thanks for info. I telephoned them and they gave me details of page 73 of their catalogue. So much choice, it's a bit of a mine field - and I do do think that there is anything quite bright enough, or waterproof, that would fit the bill. I'm starting to wonder whether I could just replace the bulds with LED's?? ( The old design uses 2 x 10 watt halogens, and if I'm not on EHU I dare not use it!)