Proposal: Lighting Design
Lighting design primarily includes electrical designing of chips, and fixing them on boards, coupled with led lights, which glow and create thousands of patterns.
Electrical designing is completely covered by Electrical Engineering SE, a fully functional SE site. No part of lighting designs can work without electrical designing. Programming chipsets and microcontrollers using Arduino or Raspberry Pi means that they have their own SE sites.
So, altogether it stands out that this site is a duplicate of mainly the Electrical Engineering.