Something to have a think about to take it to the next level.
1) In PS, hit CTrl + Alt + 2 (Selects all the light pixels)
2) Select a new curves layer based on that selection
3) Change the blending mode to Multiply (Maybe try overlay too as an experiment)
4) Change the opacity to suit - Start around 10%
(If you use Liminosity masks, you may try intersecting the lights selection to get the even brighter pixels)
Thanks Russell, I don't really use Photoshop, I do pretty much all my processing in Lightroom. It's something I really must start trying to use a bit more but I find all the menus and options all go over my head at the moment. I suppose if I never try to use it I'll never learn.
I'll take your tips onboard and have a try as a little lesson