Conflicting information about light for Cattleyas

[Alvaro78]

Hello guys! I have started to introduce myself to the world of Cattleyas (I love them so much now haha) and well I am having some confusion regarding their light requirements.

My growing conditions are indoors in a quite tall west facing window. Right now here it's summer in Spain (Madrid) and well you can imagine the heat right now. Soooo I have been reading some stuff and the AOS has some information regarding Cattleya care and they say that even in a west facing window they can receive direct sun because they state you cannot sunburn a Cattleya indoors. Before this info I was growing them with my fine curtains when the sun started to hit during the evening. I also have an app which is kind of popular for light reading called Photone which gives me an aproximate reading and during the evening I'm getting from 100-400 PPFD (about 500-2000 FC) which depending on the source would be sufficient for Cattleyas, but my real question here is whether I can actually give them Spanish evening direct sun to my Cattleyas without any issues if I introduce them to it slowly or if my present conditions are good enough as they are and I should keep them like that.

Thanks a lot!