Help with direct sun/filtered sun

[TOMMYMIAMI]

Ok guys, I hope this newbie is not driving you nuts with all the questions. I think i did figure out most of the staff regarding my babies, there is still the question regarding light/sun. So, if you can, please shoot me your advises and comments. My balcony is on the 5th, last floor in our building, positioned north-west. I am getting the direct sun starting around 3pm till the evening time. Left balcony wall is in the shade 24 hours a day, and there is also double wooden step made especially for orchids, so there are orchids that likes the shade, phals, oncidiums, miltonia, flat leave Vanda. It is not dark but it does not get direct sun at all. Railing is bamboo, letting little bit of sun through via gaps, and along the railing inside the balcony are many orchids hanging in the pots or baskets, bulbophyllums, masdeviallias, cattleyas and few others, they seem they are pretty happy there. The question is for the right corner side, where there is late afternoon direct sun. I do have orchids, like some dendrobiums, and even cattleyas and few others that should get filtered sun, or some pages say even direct morning or late afternoon sun. I did place them at that spot, but it seemed some of them did not like it at all and got burned, even the sun is there from like 4pm till evening. Some of them are doing well at that spot. So question is, is DIRECT AFTERNOON sun acceptable for orchids, especially those, that need lot of light and some direct or filtered sun? Should I put sunscreen shade cloth there to filter the afternoon sun and keep them under? I am really trying to do my best this year, to make them bloom, most of my orchids is doing fine regarding growths, but mmany has never bloomed or did not bloom after the first time I received them in the bloom already Any advises regarding light, direct/filtered sun, and what orchid likes what would be greatly appreciated. I have really a big collection of probably 20 different kinds and it is getting complicated what to provide to whom to make them happy and blooming:-)