What is a normal range of reading of the Light Sensor using EV3 Raw Sensor block?
My FLL team wrote a light sensor myblock that converts the raw value to a number between 0 and 100. They run it on the EV3 so they can use their existing NXT light sensors. It should work on the NXT brick as well. Here is the video they posted to explain how it works. 

http://youtu.be/I7Bqvk-uMLk