Most of us who have lurked on this forum for years, growing weed under LED’s have seen and experienced the phenomenon of Amazon blurple lights. Their claims have become so ridiculous that I can’t in good conscience recommend any of them.
There are a few good companies building quality lights with top-bin diodes: Horticulture Lighting Group is top of the list. California Lightworks, CHILled Logic and a couple of others.
The thing is; light is the engine that drives all processes in the tent: without adequate light, nutrient uptake is reduced, photosynthesis is of course lower, plant is less healthy and more susceptible to disease etc. Gotta start with the light.
You have another option; one I chose years ago. Build your own light. The components are readily available and there is a thread here:
The folks here are very helpful.
The state of the art in lighting currently goes to LED’s. But that’s good LED’s vs. crappy ones. The diodes available today do an absolutely amazing job.