How can I light up my model in edit mode? There are some details that I can’t see well enough, they are too dark shaded.
Simple answer, use Z to go into Wire mode and H to hide elements that are in the way (Alt-H to unhide). If you have a Material added then you can raise the REF value of the object in F5, Material tab.
Complicated answer, pull down the User Prefs window at the top and goto “System and OpenGL”. At top-left you can set the Vector, Color and Specularity of each Light.