I'm growing trichs under a Migro 100 that is about 30cm away from the highest tops (plants 40cm). No etiolation whatsoever. Pete, this way it may be possible to grow them larger. My growing space is 90x80cm. At the sides I grow lophs because they need less light.

You see HuarxScop, HuarxLumb, HuarxPsych0, SS02xKimGia, KimGiaxSS02 ans lophs from different regions. Some small cuttings are still forming roots (shriveled look). Substrate is Seramis which they seem to love, topped with small pebbles for different reasons. I plan on switching to lava for the lophs for aesthetical reasons and faster evaporation.

Growth rate depends upon hybrid, but is about 0,5-1mm/day. They get 16 hours light/day since a few weeks, before it was 18. I feed them 1/4 strength low-nitrogen cactus-fertilizer every 10 days and on occasion regular plant-fertilizer for the trichs.