Synthetic waxes continuously used dry your paint. Natural Carnauba is the true conditioner for paint and every 2-3 months atleast you need to use it. I was also under the wrong impression earlier of avoiding Carbauba on light colors.
Some waxes that have White Carnauba are the best option. Collinite 476 has White Carnauba blend. If I am not wrong Nanoskin Hydrophobic also has a blend of White.
Nothing takes care of paint life better than Natural Carnauba. Synthetic are not for regular use.
Also someone above said wax only needed once in 3 months. No that isnāt true for our environment. Maximum time gap should be a month no matter what the writing on your wax claims