In the Vase of Flowers by Jan Davisz de Heem, he highlights the flowers really well. By adding white to the flowers original color and then adding white to the backround like a halo makes it look like there is light reflecting off the flowers. Another tequniqe he uses is shadowing. HE does it the best think on the leaf. Leafs are hard because you have to show the light but also you have to make sure the leaf looks curved which is hard, but he did it very well.