Confusing about bright filtered light

[LilyLily]

I have been reading through different documents regarding the light requirement for plant, but I am still not sure what is Bright Filtered Light. I have a south facing window. If I have my window closed, is it considered to be Bright Filtered light? Some documents say window glass is not light filter, so I have to use sheer curtain as filtered, that is my confusion here. I have kingianum recently, so want to setup right environment for it, especially for the summer. Anybody could help to solve my confusion, I would be really appreciated! Thanks.

[Clawhammer]

Where in the country are you located?

[estación seca]

Welcome to the Orchid Board!

Yes, the farther South you go the hotter the sun. For most people a sheer curtain in a hot sunny window will be fine for a Den. Kingianum in the summer. But in winter it will be harder to provide enough light at Northern latitudes.

[LilyLily]

Originally Posted by estación seca

Welcome to the Orchid Board!

Yes, the farther South you go the hotter the sun. For most people a sheer curtain in a hot sunny window will be fine for a Den. Kingianum in the summer. But in winter it will be harder to provide enough light at Northern latitudes.

Thanks for replying. I live in Philadelphia. Few leave tips of my Kingianum are dried or kind of melt down( rotten)in the summer, that is why I suspected that without sheer curtain sun ray through the glass is considered to be direct sun

[Clawhammer]

If you post a pic we can tell you if those were burns, but from your description it does not sound like sunburns.

[LilyLily]

The image has been attached

[estación seca]

That tends to happen with thin-leafed Dens when they aren't watered enough, and also when they are attacked by spider mites. I don't have time to write more right now but you can find spider mite information using the Search function in the top maroon menu.

[tmoney]

just throwing it out that you can get some free apps to measure light intensity. they are decent enough to get an idea of your light levels. take readings at regular intervals from your windows. it will at least give you an idea of how quickly light falls off. the differences can be quite dramatic over very short distances.

also, my experience has been that nearly all plants, orchids included, are able to tolerate more light than we think. only caveat being that a thorough and regulated adjustment period is needed. NOTE: i am not advocating for just throwing your plants into full south exposed window sun. buuut, against all advice we have found that many species that the internet says are "shade grown" do quite well for us in a couple hours of direct sunlight each day. however, they are meters away from the window and while it is intense sun, the actual light levels are very low. and edit to include, we regulate sun with very good airflow which (i believe) reduces leaf temps...and in winter the sun is very indirect and at the same distance, the light levels in june are much higher than levels in december (not to mention duration of exposure being reduced)

[Dimples]

In my area of Southern California, as far inland as you can be while still being considered “coastal” San Diego, bright filtered/indirect light indoors is the first 2-3 feet in front of an E/W/S window that has a sheer curtain to diffuse the light. Any further into the room is considered low light, and I have a house that looks brightly lit during the day to human eyes.

I’ve learned that I can’t forego the curtains. Without them the direct sun is too intense, even for only a few hours. The sun is just too hot here.

As far north as you are and so long as airflow is good, you can probably add a sheer curtain and put “bright indirect/filtered” plants right up on the windowsill.

[rbarata]

Sometimes, when I want that kind of light, I put the plants behind a bigger plant. In fact I've considered to but some young bamboos with that intention.