48 laser diodes to reach 3000 lumens, that 16 per colour, so 3000 lumens of red, 3000 lumens of green, 3000 lumens of blue. That means around 187 lumens per laser diode. Looking around the net, 200 lumens per watt lasers are available now, so that means maybe 1 watt per laser diode. That means 48 watts to hit 3000 lumens. That is really good. Of course that's all without accounting for inefficiencies and losses in the optics and internals, plus whatever despeckling tech they're using.
I guess they went with having lots of lasers instead of having really high powered ones, for redundancy. So if one of your red lasers dies suddenly, and you are left with 15/16 working, then the blue and green ones stop using one each to keep the white point stable. But, that's just what I'd do in my own designs. I assume they have very good engineers so I'd be surprised if they weren't taking advantage of their redundancy to expand lifespan.