Night Lounge by SoulessEmpathy Interior Rendering in iRay - How to Brighten Up The Scene

I converted most of the materials in the Night Lounge to iRay & made the lights emissive - but the interior of the scene is still too dark. Does anyone have any suggestions on how to brighten up the scene?
https://www.daz3d.com/night-lounge
Has anyone else encountered this issue? How did you fix it?
Comments
If dialing up the light intensities doesn't give you the light you want, you might try adjusting the exposure value (lower = brighter).