Gleam lanterns emit light up to 7 blocks, when gleam color is right.
Use chisel and place liquid that plants like there.
When using lava to chiseled block it will burn anything adjacent that it can, even when it has visual wall between because lava is populated by whole block.
Powerful gleam colors seem to be these
Older layout I did use with organics, don’t trust table on there. Game got updates after that.