LED Flashlights

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Why Buy Red LED Flashlights?

Astronomers prefer to use dim red lights during their observation sessions in order to prevent the eye’s pupils from constricting. The way the eye is constructed, red light guarantees low eye sensitivity. This ensures that the eyesight remains as adopted to night-time vision as possible.

LED lights are optimal because they use a lot less battery than normal incandescent lights.

Advantages of LEDs

  • Efficiency: LEDs are able to produce more light per watt than incandescent bulbs.
  • Color: LEDs can emit light of an intended color without the use of color filters which is more efficient and can lower initial costs.
  • Size: LEDs can be very small (smaller than 2 mm2) and are easily populated onto printed circuit boards.
  • On/Off time: LEDs light up very quickly. A typical red indicator LED will achieve full brightness in microseconds. LEDs used in communications devices can have even faster response times.
  • Cycling: LEDs are ideal for use in applications that are subject to frequent on-off cycling. Fluorescent lamps on the other hand burn out more quickly when cycled frequently.
  • Dimming: LEDs can very easily be dimmed either by pulse-width modulation or lowering the forward current.
  • Cool light: In contrast to most light sources, LEDs radiate very little heat.
  • Slow failure: LEDs mostly fail by dimming over time, rather than the abrupt burn-out of incandescent bulbs.
  • Lifetime: LEDs can have a relatively long useful life. One report estimates 35,000 to 50,000 hours of useful life, though time to complete failure may be longer. Fluorescent tubes typically are rated at about 10,000 to 15,000 hours, depending partly on the conditions of use, and incandescent light bulbs at 1,000 – 2,000 hours.
  • Shock resistance: LEDs, being solid state components, are difficult to damage with external shock, unlike fluorescent and incandescent bulbs which are fragile.
  • Focus: LEDs can be created to focus its light. Incandescent and fluorescent sources on the other hand require an external reflector to collect light and direct it,which is highly inefficient.
  • Toxicity: LEDs do not contain mercury, unlike fluorescent lamps.