I dunno if I agree. More wattage gets better penetration than your little 23 or 42 watters and you can still keep it close, like two inches, provided you run a fan or an open space to dissipate the heat.
Yes, you can run a fuck load of 23 watters adjust all the little fuckers every couple days but thats to much work for me. I use two 65 watt and five 42 watt for 340 watts. They are at the top of my grow space. The plant shelf raises or lowers rather than the lights. One internal fan on the foliage, one exhaust fan out the top. My fully LSTed plant gave 33 grams dry and my small clone gave up 23 grams dry.
You can check out my indoor stealth grow shelf. I dunno if all my posting show to other forum readers or not but if you look under my name my posts are listed. Im no expert, but my shit is working well.