A Newbie

That's how to play the game. That's how to piss all the players off

Can't do it wrong... do what works for you. I will say you typically get an extra inch or two of stronger light out from the other axis of the light (perpendicular to the bars). So if you have rectangular 2x3 shape from pots, i'd rotate that light 90-degrees from what it is in the picture... or rotate the pots, whatever is easier. You'll get 4-6" out of really good light and maybe 2-4" on the other axis -- specifically because of the geometry involved with distribution of diodes. Visualize a point off each axis out from light, then draw lines to each diode.. you'll quickly see there is a shorter average distance as you go. Small difference but if you have a rectangular shape, might as well match the light footprint as best you can. Refelctive walls help a lot on the edges/corner, too. If you don't have a canvas, polyfilm or 'panda film' as some call it, is a great, fairly inexpensive option to use with about 90% refelctivity. Put some adhesive velcro in a few opportune spots and can improve light around edges. If no extractor fan, just don't fully seal it up... polyfilm from just above the light to just below the canopy is all you need to get vast majority of the benefit and still not need an extractor fan. Hope you are growing autoflowers, so light leaks are irrelevant. If this is about entering contests -- shill.. shill like you've never shilled before, lol. Only slightly kidding, as it will help. Put marketing stuff and branded products in pictures. Get a little 'picture studio' kit so you can have a solid background with good lighting. Don't take pics under grow lights. Focus on the superficial. Respond to every comment, even make mindless comments on 100s of random diaries fishing for likes. Always reply; always smash like. It's a game, if you are willing to play it. The outcome of a grow is a fairly small part of the evaluation.