Aexio obstruction light, marine lantern, helideck landing platforms use high-brightness LEDs to create light, as opposed to traditional ones that use incandescent or fluorescent bulbs. Below you will find a small discussion about each of the three technologies and the advantages of LEDs.
Incandescent bulbs use a 100-year-old technology that generates light by passing a large amount of electricity through a small wire. This wire glows bright white (almost) and radiates energy in all directions. A consequence of this method of generating light is that only 15% of the energy produces visible light, the remaining 85% dissipates in the form of heat. Apart from the rainbow of colors that create white light, you must filter all the light except the color you want the lamp to emit. (eg, the blue lens filters all colors except blue). Finally, a very small amount of energy emitted by the incandescent bulb is seen by the observer through the color filter.
As illustrated above, in order to filter incandescent bulbs from the inside, the intensity depends on the color. For blue the transmission filter is about 0.4%, for green, about 1%, and for red, about 1.5%. The rest of the energy is lost in the heat dissipated.
Convenient but fragile, complex and dangerous for the environment. Compact fluorescent lamps have been developed as a relatively effective alternative to incandescent bulbs and many of the beacons that use solar energy use these lamps to source light. In short, fluorescent lamps contain a thin glass tube filled with argon and mercury vapors. At each end of the tube are metal electrodes that are coated with alkaline oxides, which remove electrons easily. When a current passes through the ionized gas between the electrodes, the fluorescent lamp emits ultraviolet radiation. The inside of the fluorescent tube is coated with phosphorus, zinc silicate, magnesium tungstate. These phosphorescent materials absorb ultraviolet radiation and radiate energy in the visible spectrum. A fluorescent lamp will work until the alkaline oxide layer on the electrodes is depleted. When the fluorescent lamp starts, it needs a starter and ballast that offers up to four times the normal working voltage at start-up.
Similar to incandescent bulbs, fluorescent lamps create unfocused light and produce uneven lighting. To compensate, the systems that use fluorescent lamps have installed in the reflective component to redistribute the emitted radiation, which is inefficient and creates additional costs by increasing the complexity of the product.
Fluorescent lamps consume up to 20 watts depending on how they are used (although the tubes are listed at low power it is important to consider that the production of ballast uses energy). This level of consumption requires large, expensive solar modules (associated with expensive installations) needed to generate the necessary energy. In addition, large and expensive batteries must be used to store the necessary energy to give sufficient autonomy to compensate for seasonal or climatically poor conditions in energy production.
Fluorescent lamps tend to be either on or off. Although it is not impossible to adjust power dynamics, it is a complicated process. This makes the power adjustment process difficult, inaccurate or non-existent, for solar powered products this is done passively and varies depending on the weather or seasonal conditions.
The lifespan of fluorescent products is about a year and the products that use them require regular maintenance. Costs increase in terms of maintenance, positioning and recycling (fluorescent tubes are considered hazardous materials).
Manufacturers of fluorescent tubes calculate a lifespan and brightness in ideal operating conditions where working temperatures do not reflect real environmental conditions. Performance and lifespan decrease dramatically in the event of extreme ambient temperatures.
Another step back with fluorescent tubes is the fact that they are made of fragile glass. If the texture is impeccable, the tubes break with minimal force and the lamp stops working. In addition, the resulting shards are sharp and dangerous.
The US Environmental Protection Agency regulates their disposal because they contain highly toxic mercury and other toxic materials.
The Heart Light Emitting Diode (LED) is a "chip" of silicone the size of a grain of salt and is made of a mixture of crystals. When a small electric current passes through this chip, light is generated. LEDs offer a number of technical advantages over any other lighting time, including: The color of the light produced by the LED depends on the combination of crystals contained in the silicone chip. That is why the LEDs produce a single color, the necessary one, depending on the particularity of the application. Almost all the energy used by the LED is used is intended for color without the need for a filter. Currently the colors emitted by LEDs are white, amber, red, green and blue. Compared to incandescent bulbs or even fluorescent tubes, almost all the energy used by LEDs is converted into light.
As an example in the graph below, the light efficiency of an LED varies between 5% for blue and over 20% for red and almost no energy is wasted in the heat dissipated.
- In addition, the shape of the LED body focuses light without the need for other optical components, making it more efficient and cost-effective to use in light production. The isotropic nature of incandescent bulbs and fluorescent tubes requires external optics to collect the emitted light and direct it in the desired direction.
-The combination of these effects makes LEDs much more efficient in light production than incandescent bulbs or fluorescent lamps. In addition, the lifespan of an LED is approximately 100,000 hours (27 years assuming that the LED is used continuously for 10 hours each day); this is 20 times more than the best incandescent bulb (5,000 hours) and twice as much as the best fluorescent lamp (the cold cathode fluorescent tube is rated at 50,000 hours).
LEDs are extremely durable. Vibrations or shocks destroyed the filament of incandescent bulbs and the glass of the fluorescent lamp tube. On the other hand, LEDs, by comparison, are state-of-the-art and virtually indestructible technology!