California Lightworks has tunable spectrum light articles that can give you an idea of recipes and optimal mixes at each stage. ScynceLED has many informative articles on the subject as well.
A complete guide to maximize the potential of your SolarSystem series led grow lights from California Lightworks. Read more.
news.californialightworks.com
PHYTOFY RL is a tunable LED horticultural lighting system for research applications with real-time control and scheduling features.
www.osram.com
I'm interested in red manipulation but imo a lot of it would be much more beneficial with c02 to really take advantage of finishing times and vigorous growth.
I still haven't invested but I've been looking bridgelux Vestas or ScynceLED but my whole setup needs to be overhauled.