Acclimating plants to higher light

[Roberta]

Renanthera not really a high-light genus. Not as much as Vandas. So what you observed is not uinreasonable... probably just a case of a small blast of sunlight on a surface that was horizontal so got for a bit longer. Note that a lot of Catt leaves are at least somewhat vertical... certainly not all, but many use that "strategy" to protect from strong sun.I have, however, managed to toast Catt leaves, but it does happen more on plants where leaves are horizontal.