Light reflection problem on 3D texts

Reset light properties to the default values. The intensity is more than 1300%. That is way out of range. 

Intensity 100%

Cast Shadows On

on the extruded layer

Accepts Lights On

Casts Shadows On

Select both layers, and press the A key twice to bring up material options and light options. You may have Accepts Lights turned off.  Make sure that Comp Preview is not set to Draft. 

If you can't figure it out, embed a screenshot by dragging it to the Reply field instead of Attaching it so we can see it and show us what has been modified on the layers by pressing the "u" key twice.