LED HPS combo

I was wondering if a 600w HPS with a 300w LED would work good together in a 5'x5' grow tent? I am growing 6 plants and plan to LST them to be as short as possible. A 600w MH is being used during veg and a switch to the combo at the start of flower if it's a good idea.

if the LED is quality, i don't see why not.