New roots or old ones that didn't get to grow?

[Roberta]

Just move it away from the window. Even if the room seems uniformly bright, light is much less intense away from the source.
In fact, do consider supplemental lighting as the days grow shorter. It doesn't need to be a fancy grow light, just a full-spectrum LED. When I first got into orchids, I used my spare bedroom as a "greenhouse". It got good morning light, but after 4-5 hours the sun shifted and became very indirect, and I got very few re- blooms. I got some (really cheap) shop lights (at that time it was fluorescents, LEDs weren't available yet) on a timer, 12 hours a day, and got about 805 reblooming. The lights weren't bright, it was the duration - the extra hours- that made the difference.

[Burgos]

Originally Posted by Roberta

Just move it away from the window. Even if the room seems uniformly bright, light is much less intense away from the source.
In fact, do consider supplemental lighting as the days grow shorter. It doesn't need to be a fancy grow light, just a full-spectrum LED. When I first got into orchids, I used my spare bedroom as a "greenhouse". It got good morning light, but after 4-5 hours the sun shifted and became very indirect, and I got very few re- blooms. I got some (really cheap) shop lights (at that time it was fluorescents, LEDs weren't available yet) on a timer, 12 hours a day, and got about 805 reblooming. The lights weren't bright, it was the duration - the extra hours- that made the difference.

Since you have experience on lighting, just a quick question about my east facing growing window. My plants are about 20-50 CMS away from the window and now get about 2 hours of early morning light till about 11:30. My Oncidium twinkle and prostechea cochleata are both sending out flower spikes. Should I assume that's bright indirect light around 20k lumen? Thanks!