Hes gonna get more than that if using a small powered LED and a small wattage HID. If all goes well. Hes gonna get 10 to 16 ounces of dried cured buds. Hes gotta nice multi topped bush there. If he keeps temp and humidity in a decent spot and doesnt get silly with fertilizers. He should at least get 10 or 11 if both lights are positioned right. Closer to 12 - 16 is my guess.
I feel like he hit the nail right on the head. You have a very nice canopy going and everything is looking textbook from what I can tell. The only thing truly determining your yield at this point will be how much those buds fatten up, and since it looks like your canopy is a nice even with good light coverage I can see them swelling up quite nicely. Exactly as this gentleman said, I like to underestimate so I'm not disappointed and I'm thinking this is an easy 12+oz. Again, emphasizing that I tend to underestimate, a pound is entirely possible with how you've got things set up. In fact, things look so dialed in inside your tent that I'd even suggest looking into CO2 for your next run. If you run CO2 and perhaps grab another one of those LEDs then suddenly 1.5-2lbs becomes attainable with this set up. When I had plants like yours outdoors they would yield 1lb minimum in 15g smart pots and looking back I feel that was mediocre.
You have a journal or something? Very much interested to see how everything turns out