You can eat the cleanest raw food on earth, but if you spend all day under artificial bulbs, you will still feel exhausted. Food gives your body the building blocks. Natural light tells your body what to do with them. If your light environment is broken, pristine food alone will not fix your energy. Fix your light before you obsess over your diet: + Morning sunlight in your eyes to set your master body clock + Midday natural light on your skin for physical energy + Orange sunset light to tell your brain the day is ending + Zero artificial blue light after dark to protect your sleep Fix your light, and your body handles the rest.