Looking at Experimental Data!

Today we looked at the circadian light level results of my white iPhone. I assumed my phone would have a greater impact on the brain's melatonin levels at different brightness levels which could suppress sleep. Today, I learned the circadian light levels were so low for even when my phone was at its brightest that they would hardly impact the melatonin levels at all! At its brightest level, my phone would effect those levels by only 3%. This was a very small amount and we were measuring these levels on an eye that was 6 inches away from the phone, which is a closer distance than people usually hold their phone at. Brittany also showed me the effect on TVs, computers, and tablets. For TVs, the usual distance of the viewer from the screen makes it so that their melatonin levels are hardly effected at all. For computers, the highest affect on melatonin levels was the Mac's screen, which effects the levels by 34%. Tablets were a lot like phones, in that their normal brightness, does not effect melatonin levels very much. Overall, it was the brightness of the screen that changed the affect of each item on melatonin levels. So the color of the screens, like blues and reds, did not change the melatonin levels at all. At highest brightness levels, screens affect the viewer more than at regular levels but they still did not change the viewer's melatonin levels by too much. Out of all the items used, Apple products changed melatonin levels by the highest percentage!