Wall Layer Lines

Can you edit the individual layers, or component, lineweights of a wall?

Yes. Here's how:

Go to the Visibility/Graphics window (type VV)
Click the 'Cut Line Styles' checkbox under 'Overrides Host Layers'
Click the 'Edit...' button
Change the Line Weight, Colour and Pattern of each wall funtion

This is something that you may want to save in a 'View Template'.

Lighting and IES in Revit Architecture

Can you import and IES file into Revit Arch?
No, only Revit MEP.

Will the IES file in Revit MEP adjust the rendering?
No, but it will adjust the Average Estimated Illumination table. You can also use IES files in VIZ for rendering.
check out this site.

What kind of lights can you make in Revit; incandescent, fluorescent etc?
You basically have only the power(lumens) and colour to play with. Start with a light family template and then wrap it in a 'solid' which contains an accurender material, like glass. Then adjust the lumen count for power.

Linked Export DWG Layers

Issue:
When you export a Revit file containing a rvt link to dwg, the colours of the link are set to BYENTITY instead of BYLAYER.

Solution:
1. Export, to CAD Formats
2. Click the Options button
3. Under 'Layers and Properties' choose 'BYLAYER, no overrides'

Pulling Wall Layers up and down

This video explains how to adjust the components of a wall. For instance, pulling brick down past a floor system to sit on the top of foundation.