The render panel lighting is for those that want the full PBR control and correct lighting controls in lux, very confusing for most users but handy to control all lights in the scene at once.
For example changing the light power level when there are 100 point lights all with different brightness properties in their main entities will adjust them as a whole, whereas adjusting the slider in the light property of the entity will adjust only the 1 light. Imagine it like a master mixing slider for audio. the render panel is like the master lighting controls over the brightness etc...
IBL image is a 6 sided image as a DDS. For examples, take a look in "Asset Library/Textures/Cubemaps", then drag one of these onto the ibl image docket.
The lighting panel, was just another workflow in case a user wanted to adjust a scenes lighting from dark to daylight as adjusting ambience, lighting and fog controls can take a bit of work whereas 1 slider does the lot 
Hope this helps and makes sense 
Statistics: Posted by SolarPortal — 26 Sep 2017, 10:24
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