It’s clear that climate change has reached a point where it can affect people’s daily lives. It has affected society by the increasing number of power outages from coast to coast.
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In fact, emergency lighting has become a critical safety feature for many. The power outages from increasingly severe winters and summer storms mean it may be time to check and repair your lighting system.
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Keep reading to learn about emergency lighting systems and how it contributes to a building’s safety.
Life is showing signs of getting back to normal, and buildings are beginning to reopen. This means that property managers must ensure the building follows emergency lighting standards.
Whether it’s a residential or commercial property, these systems must follow regulations. Doing so helps keep everyone safe in the event of an emergency like a fire.
The system is in place to provide lighting for a safe escape when the main source of power fails. In these situations, a building without emergency lights can prove fatal to trapped inside.
Some systems wire directly into the main electrical supply. Others integrate a separate power source, like an emergency light battery. This guarantees light even when the main power supply shuts off.
Property managers and owners must conduct routine maintenance on their fixtures. Batteries have a notoriously short lifespan and must be constantly tested. In order to pass the test, batteries must be able to provide light for a minimum of 90 minutes in case of power failure.
Generally, a licensed professional must conduct these tests every six months. However, not all lights use batteries as a power source. The code only states that exit signs must remain illuminated. This means that you can use other sources of illumination like photoluminescence.
Buildings with public access or employees require an emergency lighting system. Some examples include office buildings, hospitals, terminals and places of worship.
Some properties don’t require an emergency lighting system. These are generally privately occupied residences. Essentially, places where the public cannot readily access them.
There are various broad categories of emergency lights. These include self-contained fixtures, central batteries and others named by their specific function.
For example, you may come across LED emergency lights, which are self-contained fixtures. These lights come equipped with a built-in recharging circuit and rechargeable batteries.
Self-contained fixtures must remain at or near 100 percent charge. They must also wire directly to the main power supply.
A central battery emergency lighting system operates how it sounds. It delivers power to a central battery using fire-resistant cables. These systems are generally found in larger buildings like offices and hospitals.
These systems are either maintained or non-maintained. An example of a maintained fixture is an exit sign with an emergency light.
Maintained fixtures operate as normal lights but remain lit when there’s a power outage. Another example of this is the large square LED panels found in schools and office buildings.
These panels can operate in emergency situations because of a conversion kit. So when the main power supply is operational, the light can switch on and off. However, it automatically switches on when the main power supply dies.
On the other hand, non-maintained emergency lighting fixtures stay turned off as long as the main power supply is operational. They only turn on in the event of a power outage. The LED bulkheads found installed over doors in stairwells are a perfect example.
The three other types include escape, standby and high-risk task lighting.
The purpose of escape lighting is to help people safely navigate out of a building in an emergency situation. You’ll find open area lighting fixtures and emergency signage within this type of system.
Open area fixtures serve as a lighting tool to help minimize panic. They also help people to follow their designated escape route. The purpose of emergency signage is to indicate the direction of each escape route. It also guides people by indicating whenever there’s a directional change.
Standby lighting fixtures aren’t a required emergency light source. However, they’re beneficial for situations that cannot experience a power outage. For example, many hospital operating rooms have installed standby lighting fixtures.
High-risk task fixtures serve to light areas where you must not have a power outage. Oftentimes, you’ll find these emergency lighting fixtures used with hazardous tasks.
While power outages in the past have been minimal, climate change has increased the odds. There are instances of more buildings experiencing an emergency situation. In addition to safety, these lighting fixtures come with several other key benefits.
The first is somewhat obvious. The most apparent benefit is that emergency lighting acts as a consistent light source. This helps to reduce panic and get everyone out of the building in a safe manner.
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They also help reduce wasted time and costs. When there’s a power outage, productivity ultimately declines. The company must also spend potentially thousands in figuring out a solution. Additionally, the installation process is simple, and the fixtures follow fire regulations.
Emergency lights can also serve an economic purpose for commercial buildings and businesses. Some may find their insurance premium drop when installing emergency lights.
Modern emergency lighting fixtures typically use LED technology. This means they have significantly longer lifespans and are much more energy-efficient.
Having an emergency lighting system isn’t enough. Without routine maintenance and checkup by a licensed professional, the system is useless. It’s like purchasing a Porsche and having it sit in your garage collecting dust.
There’s no denying that an emergency lighting system is an investment. The best way to prolong your investment and get the greatest return is to use quality emergency lighting hardware.
An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage.
In the United States, emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories, apartments, and hotels. Most building codes in the US require that they be installed in older buildings as well. Incandescent light bulbs were originally used in emergency lights, before fluorescent lights and later light-emitting diodes (LEDs) superseded them in the 21st century.
By the nature of the device, an emergency light is designed to come on when the power goes out. Every model, therefore, requires some sort of a battery or generator system that could provide electricity to the lights during a blackout. The earliest models were incandescent light bulbs which could dimly light an area during a blackout and perhaps provide enough light to solve the power problem or evacuate the building. It was quickly realized, however, that a more focused, brighter, and longer-lasting light was needed. Modern emergency floodlights provide a high-lumen, wide-coverage light that can illuminate an area quite well. Some lights are halogen, and provide a light source and intensity similar to that of an automobile headlight.
Early battery backup systems were huge, dwarfing the size of the lights for which they provided power. The systems normally used lead acid batteries to store a full 120 VDC charge. For comparison, an automobile uses a single lead acid battery as part of the ignition system. Simple transistor or relay technology was used to switch on the lights and battery supply in the event of a power failure. The size of these units, as well as the weight and cost, made them relatively rare installations. As technology developed further, the voltage requirements for lights dropped, and subsequently the size of the batteries was reduced as well. Modern lights are only as large as the bulbs themselves - the battery fits quite well in the base of the fixture.
In the United States, modern emergency lighting is installed in virtually every commercial and high occupancy residential building. The lights consist of one or more incandescent bulbs or one or more clusters of high-intensity light-emitting diodes (LED). The emergency lighting heads have usually been either incandescent PAR 36 sealed beams or wedge base lamps, but LED illumination is increasingly common. All units have some sort of a device to focus and intensify the light they produce. This can either be in the form of a plastic cover over the fixture, or a reflector placed behind the light source. Most individual light sources can be rotated and aimed for where light is needed most in an emergency, such as toward fire exits.
Modern fixtures usually have a test button of some sort which simulates a power failure and causes the unit to switch on the lights and operate from battery power, even if the main power is still on. Modern systems are operated with relatively low voltage, usually from 6-12 VDC. This both reduces the size of the batteries required and reduces the load on the circuit to which the emergency light is wired. Modern fixtures include a small transformer in the base of the fixture which steps-down the voltage from main current to the low voltage required by the lights. Batteries are commonly made of lead-calcium, and can last for 10 years or more on continuous charge. US fire safety codes require a minimum of 90 minutes on battery power during a power outage along the path of egress.
New York City requires emergency lights to carry a Calendar Number signifying approval for local installation,[1] Chicago requires emergency lighting to have a metal face plate,[2] and Los Angeles requires additional exit signs be installed within 18 inches (460 mm) of the floor around doors to mark exits during a fire, as smoke rises and tends to block out higher installed units.[3]
As there are strict requirements to provide an average of one foot candle of light along the path of egress, emergency lighting should be selected carefully to ensure codes are met.
In recent years, emergency lighting has made less use of the traditional two-head unit - with manufacturers stretching the concept of emergency lighting to accommodate and integrate emergency lighting into the architecture.
An emergency lighting installation may be either a central standby source such as a bank of lead acid batteries and control gear/chargers supplying slave fittings throughout the building, or may be constructed using self-contained emergency fittings which incorporate the lamp, battery, charger and control equipment.
Self-contained emergency lighting fittings may operate in "Maintained" mode (illuminated all the time or controlled by a switch) or "Non-Maintained" mode (illuminated only when the normal supply fails).
Some emergency lighting manufacturers offer dimming solutions for common area emergency lighting to allow energy savings for building owners when unoccupied using embedded sensors.[4]
Another popular method for lighting designers, architects and contractors are battery backup ballasts that install within or adjacent to existing lighting fixtures. Upon sensing power loss, the ballasts switch into emergency mode turning the existing lighting into emergency lighting in order to meet both the NFPA's Life Safety Code and the National Electrical Code without the need of wiring separate circuits or external wall mounts.
Codes of practice for remote mounted emergency lighting generally mandate that wiring from the central power source to emergency luminaires be kept segregated from other wiring, and constructed in fire resistant cabling and wiring systems.
Codes of practice lay down minimum illumination levels in escape routes and open areas. Codes of practice also lay down requirements governing siting of emergency lighting fittings, for example the UK code of practice, BS, specifies that a fitting must be within 2 metres (6 ft 7 in) horizontal distance of a fire alarm call point or location for fire fighting appliances.
The most recent codes of practice require the designer to allow for both failure of the supply to the building and the failure of an individual lighting circuit. BS requires that when Non Maintained fittings are used, they must be supplied from the same final circuit as the main lighting circuit in the area.
Emergency lights test, or emergency lighting compliance (ELC), is the process of ensuring that emergency lights are in working order and compliant with safety regulations. This typically involves monthly and annual tests, as well as regular maintenance and replacement of batteries and bulbs. emergency lights test is important to ensure that emergency lights will be able to provide adequate illumination in the event of a power outage or other emergency situation.
According to British fire safety law, an entire assessment of the system must be conducted yearly and “flick-tested” at least once a month. Emergency lighting serves multiple purposes: illuminating pathways for occupants to escape from hazardous situations, as well as helping individuals discover nearby fire-fighting equipment in case of emergencies.
For UK and Australian regulations, two types are distinguished:[5][6]
IEC -2-22 Ed. 3.0: Luminaires - Part 2-22: [1] Particular requirements - Luminaires for emergency lighting
IEC -5-56 Ed. 2.0: Low-voltage electrical installations - Part 5-56: [2] Selection and erection of electrical equipment - Safety services
ISO : (CIE S 020/E:): Emergency lighting (specifies the luminous requirements for emergency lighting systems)