Why not?

[Varth Dader]

My son has a saber from a company who's name must not be spoken :o !! They sent it to me for free for the purchase of another saber. It's cheap PVC plastic with a white luxeon LED. They gave a pack of colored disc with it and we've had a awesome time changing it to ALL kinds of colors.  The dark blue, red give an awesome deep purple. So I was thinkin, why don't more people just install white LEDs and add colored disc? I want to drop the red disc in my Obi TPM, but of course I can't find the disc after a recent move!??! So if anyone has a saber with a blue led try putting a red disc in and let me know what happens! Thanks

[Deke]

I'm sure someone else will chime in but essentially White with disks will always give a less-bright result than a native LED running at the same color.

[LUMINARA UNDULI]

Because color disks reduce brightness.  They are filters which are subtractive. 

[Varth Dader]

Good point. I can see using an already colored led then adding disc, but man this white is super, super bright! Matter of fact when he's not playing with it I use it as my flashlight. I have a 300 lumen sure fire flashlight and this thing puts it so shame! I may do my next conversion in white with the disc. I would mind if it was a little less bright with all the color options you can have

Thanks for the responses