Vanda seedling light requirements

[groundpounder17]

As the title states I’m trying to determine how much light my new Vanda seedling needs. I’m just getting back into orchids after many years, but I’ve never had a seedling before. I understand that Vandas like light, but I’m not sure how much light this young seedling is used to do I don’t want to stress it anymore than it already is from shipping and new environment.

The seedling in question is a Vanda coerulea supra with ~10 cm leaf length (no idea of actual age) that was delivered on September 7th. Right now I have it set up in a room with a south facing window with the conditions being between 65-85 degrees and ~60% humidity. I have grow trays and a humidifier so I can bump up the humidity if needed, but I prefer not to if unnecessary.

When this Vanda and a Laelia purpurata arrived at first I had them backed away from the window about 5’ and I left them this way until this morning when I installed a light filtering curtain. I tested the light around noon with the curtain up and plants moved close to the window which measured around 1200 footcandles.

Is this too much shading for this seedling? My plan is to monitor and gradually increase the light levels, but I’m unsure exactly what should be the starting point and how fast I should increase the acclimation process. I’m also concerned that such little light may be insufficient for the near flowering size Laelia.

Any advice would be greatly appreciated. I just don’t want to over-stress or burn this seedling.