Growth has maxxed out at 54" and buds continue to develop.
Estimate another two to three weeks before chop.
Will try to get her a few days outside in the sun when skies are mostly clear rather than "partly" sunny - just too many clouds to make the effort worthwhile.
Added a few outdoor shots from day 49. Accurate measurement of 52"!
Actually hoping she doesn't get too much taller as there won't be room under the lights for much more, even after my planned adjustments.