Sup mate.
You got a hoehnelii and the most important part isto give them low night temperatures ans cool day temperatures. Seem you about right. 16 C during the nights 27 at the basking spot during the day.
I can not give you any advice for the lights, I am not current updated on what is the good uvb light now days.
The cage seem a bit small thou and you got it beautiful arrange but it´s too expose for the animal. have a look at my gallery at my quadricornis cage. That is how it should look so they feel safe. Also you got and exoterra and that works fine for chameleons. Just dont have constant humidity as in paladarium or constant misting or waterfall due it can easily create respiratory infection.
I got a feeling the crickets are too big. trioceros take quite the smaller prey item in relation to their body compared to Yemens. Those mother fuckers can eat things almost as big as them, body size.
D3 is just once a moth. Most important thing with trioceros is proper gutloading and rotation of feeders, they can grow tired of the same insect quite quick, as oposite to Yemens. Check out sandrachameleon blogg here for good gutload recepies.
Last and quite important. Your cameleon is new so he right now needs to be alone for 2-5 days discounting misting. This is for it to settle down and dare to eat and just be a chameleon. I freak out when my mellery didn´t eat for like a week or so. I think it saw more. Letting it be for some days did the trick.