How it Works

Light Emitting Diodes (LEDs) – a semiconductor light source. Computer chips are coated with phosphor and light up by the movements of electrons on a circuit board. An internal or external power supply is used and a ballast is not required. LEDs are made from non‐toxic materials, do not contain mercury, and heat is released into a heat sink making them cool to the touch. Since there are no moving or loose parts, and since the LED is entirely encapsulated in high impact plastic, it is virtually unbreakable. No maintenance is needed and the lifespan is typically 100,000 hours of constant use before reaching 30 percent in lumen depreciation. Companies who replace 4 – T8 lamps with 4 – T8 LED lamps save more than 60 percent and with a typical run time of 10 hours a day, 5 days a week, the initial investment is recouped within 1‐2 years.

Why LEDs are better than Fluorescent
Fluorescent light is produced by a gas discharge, which happens two times on each cycle of an AC power supply. This process results in pulsating flickers of light. Standard fluorescent lights emit 120 flashes of light per second, which can boost levels of cortisol, a stress hormone, as well as growth hormone. These hormonal imbalances can cause hyperactivity, or agitated physical and mental responses. The electrical pulses, as opposed to a steady stream of light, require the eyes to work harder.

Both incandescent and fluorescent lighting causes stress and eyestrain. The yellow frequency of the light bulb is the single worst frequency for the eye. It was developed because it was the brightest of all the colors, and it reaches the cones first, but it also causes the eye to contract. The cool white fluorescent is even higher in yellow. In addition, the yellow that hits exposed skin causes a contraction in the muscles and irritates the nerve endings; which keeps you in constant state of low‐grade stress. Radiation in the form of soft x‐rays escapes out the ends of the tube up to three feet. These rays penetrate the body and cause iron in the hemoglobin of the blood to clump. This reduces oxygen flow and results in drowsiness.

When you read under an incandescent or fluorescent light, the yellow does not absorb into the paper, but bounces back creating glare. Glaring and bright lights prolong the fixation of your eyes, resulting in your eyes tiring quickly, causing headaches, nausea and tension. This glare is what puts you into reading glasses earlier.

There have been hundreds of studies done that have shown links between elongated exposure to fluorescent lights and various negative effects: (great list for a sidebar somewhere!)

• Eye strain, headaches and Migraines
• Problems sleeping, due to melatonin suppression
• Symptoms of Seasonal Affective Disorder (SAD)
• Depression
• Endocrine disruption and poor immune systems
• Female hormonal/menstrual cycle disruption
• Increases in breast cancer rates and tumor formation
• Stress/Anxiety, due to cortisol suppression
• Sexual development/maturation
• Obesity