Here are the ones I've found can do well in lower light (although hard to say if they'll bloom): All carnosas, especially the variegated ones motoskei shepherdii obovata lacunosa bella serpens acuta (I think that's what mine is; might be pottsii) archiboldiana (burns easily in sun, but mine won't bloom in shade--very frustrating!) Am sure there are more, but that's out of what I have. I say experiment. You can always move the plant later if it's not blooming after enough time! 'Mare

I have several Hoyas. A coupl new starts I purchased a month ago and a larger plant I have had several years that I started from rooted cuttings off my sisters plant. I live in noth Indiana so I have to be very careful about putting them outside. My older plant has grown slowly and I repotted it recently because it was on a very small pot. We got a cat which would not stay out of the window I was using and was stressing me and my plants out! Since I only have the one window I can use and the cat adopted it I decided to try LED grow lights which offer red blue yellow and full spectrum light along with a timer a dimmer and a choice of what spectrum you want. All the hoya which include a rope hoya, a tri color krimson queen and the regular one that I had which is hoya carnosa with the white and pink center star flowers have all started growing sensing out vines and leaves. I noticed the leaves are growing bigger and faster so it must work ok!😁 I recently repotted a verigated strand of pearls and added it to my little light party. I’m hoping it does well also!

Bouldergrower is in Boulder, CO, zone 4-5. Tropic, where are you? You guys might be speaking totally different languages. What's sunny in zone 5 may be exact same level of light as deep shade closer to the equator. (Although Boulder's 5,500 feet elevation should also be considered.) This is why all this "full sun / no direct sun / shade" advice read online is of somewhat limited use. I think generally, Hoyas bloom better with intense light, intense enough to bleach the leaves but not to burn them. BUT: leaves often look way better with less intense light, as I think your pubicalyx does, bouldergrower. So, what are your preferences then? You may get away with having the best of both, as the sunny side works well for the blooms, and the shady side creates nice looking leaves. I would consider not changing anything.

I only need to look at my sigillatis and sp. SR-2010-049 (grown in exclusively high light and neither are cultivars or sports) to make an educated assumption, that at least, for non-hybrids/non-sport cuttings, that light has little to no role in the amount of splashing. Even in my caudatas, some of which I strongly suspect are either sports or cultivars, I see no difference in splashing. And some of those were grown in my lesser-light (natural, south facing, frosted window) bathroom, for quite a period of time. I still think it all has to do with whether or not the sport/cultivar is stable. I know cv. Michelle regularly puts out highly splashed leaves, regardless of light, for me, but for another grower, not so much.