I don't know but "lumens" sort of infers that it means visible light: UV is invisible to the human eye so this might not be a scale of its brightness, & refers to the violet end of the visible spectrum which you don't want anyway. 3 lumens might well be plenty bright enough: you're not trying to illuminate the speedo face, but to get the printed markings to flouresce.

PS---- That UV bulb from Super bright LEDs ( USA ) is stated to be available in beam angle of 15 or 180 degree.
If it were brighter it might be a possible solution ? 3 Lumen doesn't sound very bright to me, and probably not much good as a direct replacement to illuminate speedo?
Pat.

TO Gruntie

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Thank you very much for your message Geoff, I will have a look at that site as well. I am indebted to you and Andy for your help !
I was really puzzled to see the bulb was working, but speedo not lighting up !!
You live and learn !!
Regards, and thanks again.
Pat

Hi again Andy, and once more Thank you ! That's neat with the Xmas tree light holder ! I totally agree that there is more fun and satisfaction in restoring an original feature where possible. I have ordered a number of UV wide angle LEDs with wire connectors and am waiting on them to arrive.
Afterwards, and by chance I came across what appears to be a direct replacement 9mm bayonet fitting, single contact, UV LED bulb on a USA site "Super Bright LEDs.COM" in St. Louis Missouri. This bulb is not very bright though, ( only 3 lumen )but it is the only brightness they do in UV. ( you might want to take a look at the site ?)I have ordered a few just to see!
I have had a few old cars over the years, Including Mk 1 Consul, Vauxhall Cresta, A couple of Y types, A Sunbeam Talbot, Riley 1 & 1/2 litre but not come across the UV illumination before ! Or if I did I didn't know it !! ( Mind you I was young in those days, just the cars were old !!
Think I read somewhere the Mk 1 or Mk 2 Jag had it ? Thanks again,
Regards,
Pat

Those pictures of Andy’s have jogged my memory: I used LEDs as these (or one of them, anyway), from ultraleds.co.uk I think:



By chance I already had a suitable holder, but I have just seen outwardly identical items on........xmas tree lights. With a standard rubber grommet in the binnacle the holder was a nice interference fit, & looked like it grew there. I used one (or two) segments of clear frosted plastic cut from a milk bottle (by chance the correct curvature) to act as a diffuser. It all works like it should.
An alternative is to just use a lower-wattage bulb in the existing holder and use some plastic segments cut from a drinks bottle to give you standard green illumination - but it’s just more fun to get an original feature working again. (The UV illumination was not unique to Magnettes, by the way: some others of a similar vintage had it too).

Thank you Andy. That's brilliant ! It really is very kind of you to take the time and trouble to help. I really appreciate it. I am waiting on LEDs to arrive and will let you know how I get on.
Thank you so much again.
Pat