Wth
No one ever talked about the advantage of not having to buy a new bulb every grow. How does that factor in to your watts to weight ratio
On the other side, bulbs are pretty inexpensive. Also if your led just happens to be a bad model (not the 14,000+ led life expected) you may find yourself with a soldering project or looking for a whole new model.
I'm happy with my 240w blackstar (135w actual) having a grid of 70ish light sources really gives you some canopy penetration. You can always see little dots of reds blues and whites making it all the way to the ground.