EV3 software does not support the Light Sensor. It does support the Color Sensor.
The solution is to use the Raw Sensor Block.
What is "normal" for raw sensor block readings?
I'm getting readings between 450 and 700, with brighter readings at the lower end of the range. I expected brighter to be the larger number. Is there an expected range of values?
Is it because the software is running on an NXT brick?