Guy responded helpfully . . .
> Brian Holt is the expert on these things! He did extensive
> trials of different types. The website to start from is
> http://www.ultraleds.co.uk I think.
>
> I've got a few of them on Virgo. Mainly the "tower" type in
> Bayonet cap fittings. My main grumble is that the cool ones
> are too cold and the warm ones too warm! I wish they'd offer
> one with a mix of the two types.
Thanks Guy - I had spotted that site via Google, I'll wait on for Brian's
further input.
What I really want to do is find something that will cover the mounting
area of the existing ceiling units and which even I can "simply" rewire. I
fear I may have to get some hardwood disks made to do the job properly.
Then I could mount 3 fairly standard units and a switch at each point. But
that's looking like an expensive and time consuming option.
Apart from the output and efficiency of the original units they are
developing cracks - fatigue like failures in the brass rims as if caused
by some kind of persistent vibration. {:o)
Beeky
