Roger, thanks for your confirmation about having both longwave and shortwave uv lights. The "pink" part of your "light green with a hint of pink" may be a result of reflection of the glow of the uv bulb!
And thanks to Alan for the comments about problems with uv analyses, for which I will add something below.
However, your "lght green (smoky)" could tie in with what I see as "dusty grey". If that is true then I am happy enough that your weight is not from Vasart Ltd (i.e. 1956-64) or Strathearn (1964-80). Are you able to adequately separate "greens" and "blues"? If so, the quite strong blue under shortwave uv of Vasart Ltd & Strathearn would be clearly noted. If that is not the case for your weight then I would say it is not from those factories.
But in my experience, weights from the Moncrieff and Ysart Brothers factories have pretty much the same longwave reaction and also much the same for shortwave reaction. So it cannot be said that uv reaction can specifically indicate Moncrieff, as it could equally be Ysart Brothers (or even other factories, UK and elsewhere).
I have found that although difficulties occur with assessment of many uv reactions, in a number of cases the reactions are so different as to be a good indicator even if the actual colour or shade is not always easy to determine, or to agree person to person. It is the clear differences that help to a large extent with Ysart and similar weights. And it is the clear differences, not the alterantives in shades of colour, that I use to determine the likelihood of a Vasart Ltd or Strathearn weight as opposed to one made at the Moncrieff or Ysart Brothers works.
Alan is quite right that there are many difficulties with uv analyses. In 1969, Paul Hollister Jr. warned about the problem in his book, The Encyclopedia of Glass Paperweights where he commented on different colours seen for weights from known factories, whereas various people had assumed certain colours meant certain factories (such as "Pink / Peach" for St Louis). At that time the analyses were done with only longwave uv., but in the book, the actual wavelength was not stated (as far as I can see), nor details of the type of lamp used.
For the record, all of my analyses of Ysart and similar weights have been done with a mains operated unit (230 volt, used with UK 240 volt system) and having dual bulbs, longwave (365 Nm) and shortwave (254 Nm).
Another point that Hollister made was that, as an artist, he was well aware of the effect that one colour could have on an adjecent colour. Without going into detail, I can confirm that when I photographed weights under uv light, using one weight as a standard control with the analysed weight adjacent to the control, I occasionally noted that the control weight showed as a noticeably different shade! Hollister's comment may well expalin this.