Mowing at night doesn't seem like the safest thing to do. I have never tried it, but I would think your vision couldn't possibly be as good even with headlights. You are more likely to run over something that will strain your marriage. /forums/images/graemlins/shocked.gif Like somebody stated above, it doesn't cool down very fast after sun down, and early morning might be the better time to mow. More light, cool temps, less dust.