Simon loves his nectar too. If given the choice a rainbow lorikeet will almost eat nectar exclusively. This is not good. I needed to wean Simon down to a teaspoon or two in the morning after Bruce had looked after him for a few years. Simon is happy with the amount he has now because he has other drinks too; watered down apple juice, a watery date drink I make from dates, sometimes a water/manuka honey drink. Simon has a love of sweet things, as all rainbow lorikeets do.
How old is Bright? Talking to him and explaining that he is allowed some nectar but not too much should help to bring him down to an amount that is alright. He is so intelligent that he will understand what you say, even if he pretends he can't. Good luck.