These look good on just a normal brush mode with light colors, but a good trick for brushing over things is to, on a new layer, brush in a medium-dark grey color, and then set the blending mode of the layer to color dodge. You may then want to duplicate the layer a few times to get the desired brightness. Sometimes this can be a very effective way to create lighting.
If you download and find these brushes to be good/useful, a would be very much appreciated. First, it lets me know that these were useful to someone, but more importantly, it can help spread them to others who may want/need them.
thank you very much my friend has been looking for an amazing set of brushes and now i can tell him that i have found them
i will link back to you if he posts anything using them