12-04-2012, 12:30 PM
Just what I was thinking. As the chap on the video says there may well be some UV in the light.
On a similar note there's a copy of the Philips (and therefore Mullard) factory codes in The Archive and these are etched on so don't rub off.
- Joe
On a similar note there's a copy of the Philips (and therefore Mullard) factory codes in The Archive and these are etched on so don't rub off.
- Joe
