Scene shutdown does not clear the pipeline out of lights

[s4m2d]

Reproducable problem: If you got a scene (scene1), that implements light:
Enable lights in the scene1:
this.lights.enable().setAmbientColor(0xffffff);
use a light in the scene1:
this.lights.addLight( x, y ).setColor(0xff5f0a).setIntensity(1);

And then switch to a second scene via: this.scene.start('scene2')
The light is successfully cleared from the array of lights in the Manager.
But a "ghostimage" remains in the new, started scene2 if:
Scene2

1. scene2 has lights enabled.
2. But scene2 got no own lights.

result: you see the lights from scene1 in scene2

[photonstorm]

Thank you for submitting this issue. We have fixed this and the fix has been pushed to the master branch. It will be part of the next release. If you get time to build and test it for yourself we would appreciate that.