Well unless you use optics your not really going to see much detail at more than 300 meters with the naked eye, its more that the higher the lux the brighter things will be at say 300 meters and back.
To make it do say 2000lm I reckon it would be down to how much power they pump out of the laser as it is still only shining onto a phosphor surface - I think the W30 is at 12watts so you would need 48+ watts I’m thinking - so it might be a cross between how much power the laser can by law be sold at before it’s classed as a weapon (as it is in a lot of countries anything over .5 of a Watt) even though no UV comes out the front, As the laser light is bent by a prism onto the phosphor then sent through an aspheric lens I’m wondering if you put too much juice through the laser it might burn the phosphor? it would be nice and hot anyway, dunno.