the problem with the light source is that its not colored properly, when making a light source try using a bright color that's similar to the one below it. the only situation where you should have a white light is when you have it UNDER a strong gradient map so that the color of the lighting doesn't make much of a difference. because the tag is so orange and red a really bright tone of orange would make the lighting fit a bit more, also put the layer on screen and lower the opacity
as for your current signature the render is lq(not your fault im assuming) i think you have to work on lighting a bit more, at least your technique of creating lighting. the text is also a bit out of place not sure how to properly put text without it being distracting but nbd.