영어.무슨 말인지 도저히 이해할수가 없어요. 도와주세요 Light is a mixture of all the colors of the

Light is a mixture of all the colors of the rainbow. Different wavelengths of light are different colors. Blue wavelengths—which help us during the day by improving our mood and increasing our attention span— seem to be the most disruptive at night. Device screens, along with energy-efficient lighting, are increasing the amount of blue wavelengths we are regularly exposed to after sunset. Studies suggest that blue light affects our production of melatonin, a hormone that helps us sleep, more than other types of light. It suppresses melatonin production and damages our sleep patterns. In an experiment, Canadian researchers compared the melatonin levels of two groups of people. One group wore special goggles that blocked blue light while exposed to bright light. The other did not wear goggles and was exposed to regular light. The fact that the melatonin levels of the group without goggles were the same as those of the first group supports the theory that blue light is harming our sleep.마지막 문장 의미가 이해가 안됩니다. 제 의견: 파란 빛이 수면에 영향을 준다고 제안했어요. 근데 고글 낀거랑 안낀 것이 수치가 같으면 수면에 영향이 없는거 아닌가요? 이거 내용이 수면에 영향을 준다는 건가요 안준다는 건가요?