How prevent sunrise light on prims?

Hello,
i have question about how to prevent sunrise light on white prims, so they don`t get redish from sunrise. I tried it several times and didn`t find the solution. In this eyewear shop this pretty works, its stay always white: http://slurl.com/secondlife/Chimera%20Cove/4/23/22/?title=YV%20-%20not%20ordinary%20eyewear

Landoptions? If so I didn`t find it too.
Thanks.

In the texture tab there is "Full Bright" which disables the lighting effects on that texture. You can then tweak the brightness by setting the color to shades of grey.

Right -- just keep in mind that with full-bright, objects will look too dull during daylight or too bright at midnight. Fullbright is great to use on something that's lit internally, like a Coke machine. In the day, it looks normal, and at night, it looks lit up.

The other option is only available sim-wide, which is to set the region to a fixed time. Of course, this won't work for anyone who has their viewer set to morning (or evening, noon, or midnight, as the case may be).

Many thanks for tips of both ways!