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2. Fluorescent lamps and health - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamps_and_health

   New lighting systems have not used magnetic ballasts since the turn of the century, however some older installations still remain. Fluorescent lamps with magnetic ballasts flicker at a normally unnoticeable frequency of 100 or 120 Hz (twice of the utility frequency; the lamp is lit on both the positive and negative half-wave of a cycle).

3. Electromagnetic radiation and health - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_radiation...

   Fluorescent light bulbs and tubes internally produce ultraviolet light. Normally this is converted to visible light by the phosphor film inside a protective coating. When the film is cracked by mishandling or faulty manufacturing then UV may escape at levels that could cause sunburn or even skin cancer. [53] [54]

4. Flicker fusion threshold - Wikipedia

   en.wikipedia.org/wiki/Flicker_fusion_threshold

   Fluorescent lamps using conventional magnetic ballasts flicker at twice the supply frequency. Electronic ballasts do not produce light flicker since the phosphor persistence is longer than a half cycle of the higher operation frequency of 20 kHz. The 100–120 Hz flicker produced by magnetic ballasts is associated with headaches and eyestrain. [8]

5. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow.

6. Photosensitivity in humans - Wikipedia

   en.wikipedia.org/wiki/Photosensitivity_in_humans

   There is evidence that compact fluorescent light can worsen the condition. With the autoimmune disease lupus, exposure to compact fluorescent lamps will induce disease activity in photosensitive SLE patients. There is evidence that actinic prurigo is worsened by compact fluorescent light. This disease affects 3.3% of the general population.

7. The dangers of LED face masks you should know about - AOL

   www.aol.com/lifestyle/dangers-led-face-masks...

   Said Palep, "At-home LED devices use lower frequencies, so [they] haven’t proven to be as effective or the results as dramatic as in-office treatments like the Blu-U light and micro pulsed Nd ...

8. If You're Going to Retire in Europe, It Needs to Be Here - AOL

   www.aol.com/lifestyle/youre-going-retire-europe...

   Discover the best-kept secret of southern Europe. Located in the heart of the Algarve, Faro is a popular choice for expats and tourists alike who find the city highly desirable to live in.

9. United States lighting energy policy - Wikipedia

   en.wikipedia.org/wiki/United_States_lighting...

   United States Lighting Energy Policy is moving towards increased efficiency in order to lower greenhouse gas emissions and energy use. Lighting efficiency improvements in the United States can be seen through different standards and acts. The Energy Independence and Security Act of 2007 laid out changes in lighting legislation for the United ...