Bug/Issue Sign "frames" different light.

Hello!

I'm reading up on the wiki pages, and it tells me I can use different "light" per frame. Can anyone confirm this is possible or simply bugged at the moment?

source https://starbounder.org/Guide:Animated_Signs#Giving_a_Sign_Light

Giving a Sign Light
If you want your sign to be lit, you need to tell EASEL so by clicking the lightbulb button. This bulb will change to the color you are currently using, thus that frame will give off that color. You can actually have different frames with DIFFERENT LIGHT COLOR - simply change the light color on each frame!