If money’s not an object I wouldn’t recommend making your own carbon filter. If you don’t pack them perfectly you end up with loose spots which allow smell through. Scrubbers are cheap compared to all the other $$$ you’re about to drop lol
Here’s a good thread about DIY LEDs. Tons of great info even if you’re not going ot build your own.
If you do build you’ll save alot of bread, but also you can create custom lights to fit your space perfectly.
You can’t really go wrong with any of the higher end prefab LEDs like MrHeadie mentioned.