summers outside-more harm than good?

[seagull]

hey guys
i put a lot of my orchids outside for the summer, including stuff that should be sun-loving; all my onc. alliance things, my cattleya alliance plants, dends, cymbs, etc
i have encountered some issues, however
most of the cattleya and oncidium type orchids lose almost all of their foliage during the summers. only a few outright died but it seems futile to put stuff out to build up photosyntate when its used to regrow leaves. since everyone came back in and has high humidity and bright LEDs, they do really well with sending out lush new growth
it gets pretty hot during an RI summer, even with daily waterings it seems too harsh for most stuff. should i only set out the dends and cymbs for summers??