I don’t know if you got them on or not, but I just purchased and set up a T5ho Sunblaster 904296 fixture. Mine were the same. It came with two types of clips. 2 for hanging and 2 for mounting. It was an absolute pain to get them on. Best recommendation, do your best to line the tiny bent out tabs on either side, and push down firmly. Expect to not get it on the first try. I then used small ball-chain looped through the holes and clipped to D-clips to the top of my cage. Moral of the story, I have absolutely no doubts that the light will not stay in the clips. They don’t even slide to position them better lol. Good luck, hope you got it.
Hi
After battling and many err choice words later I got it on but like you say 1 end doesn’t stay in clips. I have to push it on daily. Ha ha and she is still hiding under her cave most of the day and only eating 2-4 locusts a day. :/ I give up and let her do her own thing.