Hey guys,
I thought I would share my current de-yellowing station setup as someone might find it a bit comical. For the past month, I have been restoring my LEGO Technic 8480 Space Shuttle. Besides fixing cables that disintegrated, re-ordering new stickers, replacing cracked cogs, and finally on the last step - removing ugly yellow ting from white and some grey bricks.
As you may know, the usual process is to do it in hydrogen peroxide and sun - but tough luck as I live in the UK and starting to believe that sun is a mystical thing that does not exist. But since we only need the UV light - I have replaced the sun with UV LED's. I was considering bulbs, but LED's seem a lot better solution as they consume less power and produce less heat. If anyone is planning to do something similar - make sure to get UV-A light, as we need roughly 390nm waves to simulate the sun.
I found the use for the bag of fake LEGO bricks I had laying around and building a contraption to hold my LED strips in place - works like magic. I realised that if I blast light from top and bottom, it should speed up the process.
So far results are fantastic - it takes roughly 24 hours to remove the yellow tint altogether. In between, you need to shake the box, but I leave it running overnight in my cupboard without any issues.
I forgot to take photos before so have nothing to compare with, but results are phenomenal - whites look as new.
By the way - some LEGO bricks create a cool effect if you beam UV light on them: