As for lume DIY, I have tried to do it very very long time ago (it's on IWC Chrono GST Ti). Lume is RC Tritec's C3 SuperLuminova mixed with Daylight Orange from Glow Inc. Please note that the daylight orange lume from Glow Inc. comes with much finer grain than its Ultra Green powder. You can get the lume from glowinc.com and Superluminova directly from RC Tritec. It's called reparatur set. Or if you already have the varnish and lacquer, go for only the lume powder. Price per gram is about 40 CHF but exclusive shipping and bank transfer fee,
Mixed them to get desired colour. It is indeed like you said a big improvement.