The Future of Blue Light Considering Its Health Concerns

More experiments were followed by Brainard in the period of seven years starting from 1995. He and his colleague tested 72 healthy men and women to determine that blue was the strongest wavelength to suppress melatonin secretion and hence affecting circadian rhythm.

When we have a look to our eye: led street lights price are two main sensors in our eye, namely cones and rods which showcase colour and greyness respectively to brain The peak sensitivity of cones came around to be 555nm and that of rods came around to be 507nm. which is towards greenish region of electromagnetic spectrum. Even though with such a higher sensitivity to green light, the blue light was having higher ability to exert powerful effects on eye. Through experiments it was concluded that blue wavelength suppressed melatonin twice as long as compared to green!

Moreover many researchers with decades long of research concluded that light can affect many biological processes such as hormone secretion, heart rate, reduce sleepiness, alertness, gene expression and increasing body temperature.

Well this source could be from many forms ranging from sun light, arc coming out of arc welding and plasma cutting, molten iron, steel and glass. Other sources being discharge of fluorescent lamps, filament of incandescent lamps and of course LED lamps.

One of the main constituents of eye is retina (as shown in Fig 3) which is bounded by a tissue named retinal pigmented epithelium (RPE). Since melanin being the most common pigment in RPE and its property to strongly absorb blue light, puts retina subject to actinic injury. This photochemical reaction is also known as photo retinitis.

In 1992, Chen a researcher at St. led street light wholesale came to conclusion about retinal degeneration with his experiments with rats. He concluded that an important enzyme named cytochrome oxidase, responsible for respiration of retina gets destroyed on the exposure of blue light by inhibiting cellular respiration leading to retinal degeneration.

To make experiments more relevant to human beings, similar experiments were conducted on baboons which have very similar characteristics of eye as that of human beings The results were similar -. Extensive damage in the RPE due to absorption of energy by melanin granules The damage mainly. constituted of macrophagic activity, disrupted cells and plaque formation which is also termed as photochemical lesion.