I use LCD monitors exclusively for an eye prob and I run into this all the time. One of my monitors is extra dark so I try it out on that one last. Rule of thumb is assume that the picture is at least 25% lighter than on most crt monitors. Except Mac's, they used to have bright light monitors. Don't worry excessively, there's no way to approximate everyone's viewing. No one type of monitor will ever register the same. Right off the assembly line they are all different. It mostly shows up to disadvantage in a very very dark picture. Emily