I have been working on lighting my greenhouse so that it looks natural and while I have the general effect down, it is still not bright enough and has a tinge of green (because I am using fluorescent lights). But a few months back I found some LED strip lights at IKEA. You can cut them to any size. They have a controller that lets you select the tint of the lights and also has an effect where you can have the color change smoothly from one to another across the entire spectrum. I didn’t need that but I am thinking of using them to add some overall color. These are my color tests. It helps to photograph these tests because you can see the effect better in an image.