Real 80w?Yes,it could be usefull,you can veg small plants on it.I have one 23w led corn in the kitchen and i think it is too bright,i was also thinking to change it and use it for supplemental,veg,clones or something:)For mix with two HPS it won't make the specter so blue so why not:)I like to mix bulbs with different K with predominant warm or cool ,depends on the phase.You can try......

6000k is not a flowering spectrum. keep that for veg