I switch my bike out from DS to offroad/MX on a constant basis. I went round and round on this for a long time when I first got things set up. In the beginning I pulled the bulb and taped up the headlight, (sometimes throwing a number on it) but that seemed too risky in the end and expensive to replace if it got a rock. ( I commute with the bike as well)
Given a little time up front for setup, the Acerbis vented plate (be sure to get the mounting kit) has worked great for me.
I don't think I have a good photo, but I'll look tonight. It takes a couple zip ties/wire and some creative mounting, but winds up solid and works very well.
It doesn't hurt to pull the extra pound of grass off the front end as well.