hi all, don't suppose anyone has worked out what percentage = what kelvin range. looking to find a happy medium with a colour temp of about 12-14k. i know the white gives 6500k and 100% on w,b,rb give around 20000k - 23000K. i know people say whatever pleases the eye, and i know this might sound daft, but i want to please my corals, their the ones who have to look at it all day!!![IMG]http://www.ultimatereef.net/forums/images/smilies/wink2.gif[/IMG] at the moment, i run mine at W30% B35% RB35%