So about two months ago I decided to upgrade our reef lights to the viparspectra 165w. After doing some research I landed on this model for the price and for the reviews I read from multiple people on here. After getting the new light I was thrown off when the lighting power only went up by 10% increments. Especially since most people said they keep the white lights at 1-3%. Oh well, I thought. I put the whites on 10% (lowest setting) and acclimated the tank. Well all my corals shriveled up and started dying after about a month. I was not happy. I contacted viparspectra support and explained to them how I was unhappy with the newer model upgrades to this light. To my surprise they said they could just send me the older model timer and I could replace it myself and then the lights would be adjustable by 1%. And what do you know it worked!! Got the old timer in the mail (they did not charge me) and replaced the new one and now I have the whites down at 1%. Corals are finally starting to look happy-ish now. Huge shout out to viparspectra customer service!!!