Where did you get this information? The latest videos of his system tour from Reef Builders shows he only runs T5's and Reef Brite strips, no mention or sight of any Halides on any of his tanks.
On his 11’ tank in the basement he runs halides t5ho and reef brites. All the rest are t5ho and reef brites. Just on the most recent video I saw. Jda has a good point though. These people have thousands of gallons all connected together and are literally going over them with a fine tooth comb day and night. It’s their full time job. We can’t hope to give our hobbyist tanks that level of attention