Diabetic people have very light urine, due to the fact that they can drink excessive amounts of water. Check yourself for diabetes. Nobody can tell you here for a fact, it could be normal, no doubt, but if you're concerned you definitely should get it checked out. It's also possible that you are undernourished. Not necessarily eating too little food, but not consuming or absorbing enough nutrients, vitamins, and minerals. If light urine is a new occurrence, then you should see your doctor and voice your concerns. Another possibility is that you are in excellent health and well hydrated.