Nicely done Alison, the shadow is wonderful as well as the texture of your backgound. Here is a good example of where a smaller DOF would of put the bulbs out of focus and really highlighted the lily. I find the 4 bulbs in the backgound kind of distracting.
Yes great shadow, good detail. No improvement needed - but for fun Have a go at rotating it, each way looks good, upside down with that background give quite an interesting feel to it as well margaret