I wouldn't recommend using the NARS Illuminator as a bronzer. A product that I think that you would like much better that would give you a natural-looking tan is Bobbi Brown's Bronzing Powder. This bronzing powder is formulated with the perfect balance of red and brown tones (that exist in a true tan) to give you the most natural effect. It blends perfectly with all skin tones for a sun-kissed glow and the buildable formula allows for a "deep tan" look. You can take a look at it here: http://www.sephora.com/browse/product.jhtml?id=P27
If you prefer a shimmery finish, it comes in Bobbi Brown Illuminating Bronzing Powder which you can find here: http://www.sephora.com/browse/product.jhtml?id=P27
I hope this helps you.