So lights mounted on weapons no longer produce a circle of illumination. Instead you get a square formation of coloured dots. Interesting but not so useful. Have not tested the secondary use of illuminating a room by placing and turning on.
Yes I also noticed this after they put the robot invasion big bulks and defenders on caly. its very annoying - no idea why it would happen.
shining directly on a target where the light rays strike around 90 degrees looks like that. However when shining on the ground - especially on snow, and the light beam intersects at an acute angle - makes a pretty rainbow effect, I liked it