absolutely! just be prepared for him to chomp on them if he's a veiled. you might want to consider mounting a small cup to the cage and fill it with bits of greens, veilds love their salad.
Both are safe. The hibiscus will need lots of light, otherwise they don't do very well indoors. Usually, they will do fine with the UV light, plus an extra 6500K light. I am not sure of the quality of this particular brand, but I figured I'd link you to one.
absolutely! just be prepared for him to chomp on them if he's a veiled. you might want to consider mounting a small cup to the cage and fill it with bits of greens, veilds love their salad.