Isilwen
Mame
I feel you, all about making the best with what you have available. That will absolutely provide more energy to the plant but as SRT mentioned it will still be a fraction of the light that the sun puts out. My advice would be to use your current set up for a few months and if you like it and want to continue then look at getting a bigger/better light. You can always use this light for seedlings or other trees.
I've been trying my hardest not to just throw a bunch of money into bonsai as I'm learning. I've got a handful of plants and I've spent this time watching them grow and learning how they react to small changes like watering, fertilizer, sun exposure, etc. You gotta remember that bonsai is a marathon not a sprint so enjoy your setup and your plants and learn for now.
Probably what I'll do. We don't plan on being in this apartment forever. Between Covid, my child support going up, and inflation, that has put a damper on my and my fiance's plans to get a house.