Yea I went this route to try to add some reds to the 4k 80cri strips. 20 strips was $36 to my door. They seem pretty inefficient based on the datasheets and only 24 diodes, but the 120 watt 24v lne driver was only $18 as well, so maybe worth looking into as an option. Not straight reds, but the should bring a bit more 625-730 than the 4k strips it seems.
I would love to try out what you guys have been doing with those sunplus diodes, but I'll save that sort of endeavor until after I get more of the basics down with the strips I have in hand first. Look forward to reading up more on that whole process for the time being though.