lighting renders

This is my first render and I have only made the light brighter by using the mutiplier tool in the Inensity/color/attenuation and the falloff/field to make light dim the further out it goes. 

This is my second render I have done the same with the third one however I have made the light degrade from a point. I have used the Inensity/color/attenuation and changed the type of light to inverse to give the degrade effect. 

this is my third render I made the light red and made the light brighter. I changed the size of the light by using the spotlight parameters using the hotspot beam.