hello seankin, most hotels ive been to have orange lights which sets a romantic ambience. You should go to hotel showcases to take a look. Shortlist based on your price range through the banquet price lists here: http://www.perfectweddings.sg/forums/wedding-banquet-price-list/ then look out for those hotel showcases and see the ballrooms.
I'm not able to select Carlton Hotel as my friend is holding his wedding there, near my expected date too .... So, considering about Regent/Traders/Copthorne Kings/Orchard Parade ... what else ... Kinda confused !! Please help