OpenGL ES 1.1: lighted texture mapped object is too dark

Usually the texture is used as the diffuse material for the object. It is timed with the diffuse light to get the diffuse part of the lighted object color.

If the object looks too dark, you can increase the luminance of the diffuse light. If the luminance of the diffuse light is already 1, you may want to increase the luminance of your texture.