I've recently built the Marvel Iron Man Figure (76206) which comes with a light brick to power the 'arc reactor' in the set
I find it problematic that the light brick lights up orange, rather than the white/bright blue like in the movies. The transparent blue plate doesn't do much to modify the colour. I'm also building the Hulkbuster 76210 set next, which according to online reviews has the same problem with the 3 light bricks included.
Is there a third party source where I could buy alternative or modified light bricks? Does anyone have or can produce instructions to exchange the LED in a Lego light brick?