Problem with Lights

At the risk of being reprimanded I am posting this in both the Building and Texture fora as I am not sure if it is an issue of one or the other. The situation is a bit difficult to explain but I will make an effort, so please bear with me.

To set the scene, I have a wall, lets say 4m long and 2.5m high, call this lower wall (lw). Then at the right corner of the wall i have another piece (on top) that is 1m long and 1.5m high, call this upper wall (uw). On the ceiling I have a light prim, approx centred and 2.5m away from the walls. Both are the same color, same texture, with the textures aligned.

The issue I have is that, at night, uw shows brighter than lw, it is completely obvious that they are two different prims. In daylight there is no problem. I have to assume that this is due to how SL/Open GL deals with light. I have tried stretching up to be 4m tall , but it continues to show differently. I know it is due to the light because if I move it out of range or delete it then there is no noticeable difference between the two pieces.

One other comment is that this is not an isolated incident. I have a similar wall setup on the floor below and have the same issue.

So, again assuming this is due to how light works, is there any object setting, or texture setting that I can use to fix this?

Any help would be greatly appreciated, and as well I will be in world after 1130 SLT if anyone wants to see what I am talking about.

In advance .. thanks!

[reprimand]If a question doesn't fit neatly into one forum or the other, just pick one. Don't double post. [/reprimand]

See my answer in your other thread.

/me hangs his head in shame

and then answers Chosen's comments in the other thread ....

--- Sorry for not thinking this through, anyone else .. please do not pst more here as the thread is being answered in the Building forum. ---

A thousand Pardons ....

In the prims texture area - do you have bright lite checked on or off? - that makes a difference on how the same texture can look.