Before you go out to shovel the snow from your driveway and walks, take a few moments to prepare yourself for what is often a good workout. Do few stretches, drink plenty of water and dress in layers. Boots with good traction are a must, as are gloves that allow you to firmly grasp the shovel's handle. Never try to lift more than you can carry and avoid smoking as it reduces oxygen needed for such strenous work.
Believe it or not, the impact of dirty, dusty, insect-laden globes, diffusers, reflectors, or shades on your fixtures’ light production and efficiency is enormous. So, if you’re aiming for efficiency, get up there and clean them off!