440w total and 187 par watts is the watts making pure light. The rest is heat(and fan and driver loss). 42.5% efficiency overall. Equal to ~136 lumens/watt. 60,000 lumens total, 1132 ppfd. That's top end light for that space. Beyond the 900-1000ppfd you start seeing pretty bad deminishing returns. More light = more bud, but at this point more space would net more overall yield at the same light. Half that total(Vero only) probably puts you at 600ppfd, low end for flowering but very efficient. Think 1.5g/w @ 600ppfd, 1g/w @ 1100ppfd. 320g(240w) vs 440g(440w) in this scenerio. Sacrifice efficiency by just adding light, but if space is limited and more bud is needed, more light is the only way to go.
Unless heat is a concern, I'd keep the HPS in the 4'x4'. If you want more bud out of it in that space, run it vert in the center. 600w HPS is 150lm/w, 90,000lumens. That's measured 360°, hence why 90°-120° leds can put more light on the canopy at lower efficiencies. A good bit, 20-40%, is lost in reflection. Vert takes advantage of the whole light if you can manage heat(cooltube, and I've seen some run bare bulb with a box fan on the ground).
Id scrap the mars or DIY convert them to Cree/vero, they won't be an improvement over HPS unless heat is a concern. You need ~600w of mars to equal 600w of hps, and again the spread is poor(Mars 1200 loses to 600w hps at anything beyond a 2.5'x2.5' space, based on their own par charts.)
Unless heat is a concern, I'd keep the HPS in the 4'x4'. If you want more bud out of it in that space, run it vert in the center. 600w HPS is 150lm/w, 90,000lumens. That's measured 360°, hence why 90°-120° leds can put more light on the canopy at lower efficiencies. A good bit, 20-40%, is lost in reflection. Vert takes advantage of the whole light if you can manage heat(cooltube, and I've seen some run bare bulb with a box fan on the ground).
Id scrap the mars or DIY convert them to Cree/vero, they won't be an improvement over HPS unless heat is a concern. You need ~600w of mars to equal 600w of hps, and again the spread is poor(Mars 1200 loses to 600w hps at anything beyond a 2.5'x2.5' space, based on their own par charts.)
