When my female Veiled was small I thought the same thing - put a Fuchsia in her viv to add colour. Great to start with until it dropped all its flowers and made a mess! Only bothered trying it the once! Hibiscus can be encouraged to bloom in cages too. I have one in a cage that regularly goes outside and doesn't have UV over it when indoors and it is still flowering just fine! In the past when I have kept them in the indoor cages under UV tubes they have failed to flower after the first couple of blooms.