When using a LED bar (beams), the item doesn't display any lights.
Add the fixture: Eurolite/LED CBB-3 COB RGB 3x15W Bar
Highlight it/change its color and intensity : there are no colors beams in 3D View.
Regards
Edit: from https://www.qlcplus.org/forum/viewtopic ... 497#p63497 , it seems to be a known issue from beta1