I've just experimented with lighting, and I've noticed that when you set the rotation of a sprite with a lighting effect, the lighting looks like it comes from the wrong direction. Pictures would explain this most easily:
I made a test project, with this spinning worm, ( and tested different positions, adding children, ext, and this bug happens everywhere)
The following screenshots came from the iOS 8 simulator.
The worm is the sprite here, and at rotation=0 the lighting looks correct.
But as the rotation changes to 90, the lighting seems to reverse direction, as though the light source is now on the opposite side:
Approaching 180 rotation, it looks correct again:
Then it looks opposite again (rot=270):
It may not look exactly clear that the lighting is in the opposite side in some of the screenshots, but i've tried with different sprites, and the lighting is EXACTLY opposite.
This is probably a quick fix, it must just be a math error on the angle used for rotation.
I reccoment you download my sample project to see for yourself, and get this fixed quickly (100% made in spritebuilder, no code!) It's available here: https://www.dropbox.com/sh/8k1jbduurrrn4gn/AABXmpZRL7zetdrM_T-4wa3za?dl=0
(download the 'EffectsTest.