Found this in the documentation on the Light Vector node:
LightVector This expression is deprecated in Unreal Engine 4 as lighting calculations are now deferred.
Is there anything compareable now? What if I want to make a stylized game with the engine? Cel shading for instance?
Also, is there anything compare able to lighting channels of the UDK? So you can make lights that only affect a certain channel and you can put your actors into different channels.