Extended lifespans. Reduced energy consumption. Lower maintenance. By 2030, the Department of Energy estimates that LED lighting could save 190 terawatt-hours of electricity per year, which is equal to a whopping $15 billion. And to top it off, purchase prices for lamps and fixtures continue to fall, helping an increasing number of facility managers to upgrade their lighting with LED.
Seven reasons you should consider
LEDs use about 40-70 percent less electricity than traditional incandescent, fluorescent and halogen lighting options, leading to substantial energy cost savings. These savings are compounded within applications where lighting is on for extended periods of time. Further, LED fixtures can aim light hemispherically, or in specific directions, unlike conventional bulbs that emit light (and wasted energy) spherically in all directions. This directional capability reduces wasted light and energy, further contributing to savings.
Unlike incandescent lighting, LEDs never “burn out,” they simply become dimmer over time. Quality LEDs have a rated life of 100,000 hours at L70, or at least 70 percent of the initial light output, depending on the lamp and fixture. LED systems can reduce labor spent on replacing bulbs due to their extended life in commercial and industrial environments, helping
Further contributing to reduced maintenance costs, LED systems are tough. Without filaments or glass enclosures, LED fixtures are breakage resistant and largely immune to vibration and other impacts, meaning they’re perfectly tailored to the industrial environment. Traditional lighting is usually contained in a glass or quartz exterior, while LEDs are instead mounted on a circuit board and connected with soldered leads that can be vulnerable to direct impact—but no more so than your smartphone.
Many fluorescent and HID lamps don’t provide full brightness immediately, often requiring about three minutes to reach maximum output. LED systems, by contrast, emit 100 percent brightness immediately, with no restrike delay. For industrial facilities, this is critical in the event of a power outage or early morning hours.
Traditional light sources tend to have a shorter lifespan the more they’re switched on and off, where LED systems remain unaffected by rapid cycling. If you’re considering a system that includes smart controls like occupancy sensing and daylight harvesting in parts of your facility, it makes LED lighting the perfect fit.
Fluorescent and HIDs are prohibitive of advanced control systems available today. LED systems, however, are semiconductor devices, meaning they’re inherently compatible with advanced control options.
7.No IR or UV emissions
Less than 10 percent of the power used by incandescent lamps is actually converted to visible light; the majority of power is converted into infrared (IR) or radiated heat. Excessive heat and ultraviolet radiation (UV) presents a burn hazard to people and materials, which can be doubly concerning if used in an industrial environment that may contain hazardous chemicals, sophisticated machinery and more. LED systems emit virtually no IR or UV. Rapid advancements in LED lighting technologies, with more improvements on the horizon, have resulted in lowered costs and increased reliability of LEDs. And while it may be tempting to assume LEDs are the right choice for all applications because of their energy efficiency, selection should be based on a combination of factors, including light quality and distribution, dimmability and expected lifetime.
The key terms for industrial LED lighting
Index An international system (based on 0-100 scale) used to rate a lamp’s ability to render object colors (the higher the CRI, the richer colors generally appear); Numerical comparisons of different lamps are only valid if the lamps are close in color temperature (CRI differences are typically not visible to the eye unless more than five points)
Using daylight to offset the amount of lighting needed to adequately illuminate a space; Achieved with lighting controls with the purpose of reducing electricity use
Adjusting lumen (light) levels over a set (step) or linear (continuous) range with the goal of setting the atmosphere or reducing energy use
A measurement of how effective a light source is in converting electrical energy to lumens of visible light; Expressed in lumens-per-watt (LPW)
The term used to refer to the complete light source package with inner parts as well as the outer bulb or tube; “Lamp” is also commonly used to refer a small light fixture such as a table lamp
Short for light-emitting diode; As light sources, LEDs act as semiconductors similar to silicon chips; Illumination is achieved by the movement of electrons through a semiconductor material, rather than by sending an electrical discharge through an ionized gas
Measures the quantity of light emitted by a source; A dinner candle produces about 12 lumens while the traditional 60-watt incandescent bulb provides about 840 lumens
A complete lighting unit consisting of a lamp (or lamps) and ballast or driver (when applicable) together with the parts to distribute the light, position and protect the lamps, and connect to the power supply
L Rating, or rated lumen-maintenance life
Rated lumen-maintenance life measured in hours with associated percentage of light output; For example, an L70 of 30,000 hours indicates the LEDs produce 70 percent of initial light output at 30,000 hours of use
LPW/lumens per watt
Luminous efficacy, or the measurement of the rate at which a lamp converts electrical power (watts) to light (lumens); Expressed in lumens per watt (LPW)
Source: GE Lighting