How to add more light to the 3D view Is there some way to add more light to the 3D scene during modeling?

Not to the final render, but just make the object more visible.

I followed few tutorials and I do exact steps but somehow their model during modeling phase is with more light even if no light in the scene is present.



To better explain myself - I'd like to make modeled object (without material and other stuff) to be more lighten up

Here is how I see object during modeling:


Here is the same object but I moved my position in viewport:




During tutorial (space corridor from blender guru)
is his object far more visible during modeling from different angles.
For me is my object far more darker - as it is visible on picture 1.
I'm afraid there is no way to fully fix this issue, but you can help slightly. 

In file > User Preferences > System under "Solid OpenGL lights" (1) you can see three sets of colours (2). 


Editing all of these to a full white, (Clicking on each then adjusting the colour to the brightest white.) will help your issue.

EDIT: After viewing your edited post, i can say this is what my answer does. But like i said only to a extent. But, i have noticed, if normal's are pointing inside of a object, it is darker, the dark side of your object is unusual. 

Try selecting the darker side in edit view with faces selected, then hold down 'CTRL' and press 'N'  this recalculates the normals. Also another thing to try is checking them manually. To do this, press 'N' then while in edit mode scroll down until you see a section called normals. (1)


Then click on one of the three boxes, i prefer faces (2) for normal things, but sometimes it doesn't matter what you prefer.