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ATEX and IEC Ex Flame-proof Explosion Proof Lighting & Equipment
Explosion Proof Lights
Explosion Proof Motors - Motors for Hazardous Locations
Industrial and Vaporproof Emergency Failsafe Lighting
Industrial Cord Reels and Tool Taps
Industrial Work Area Heaters
Machine Vision Lights
Megatower™
QC Series Industrial Portable Lighting - Quick Change Mount
Rig Lights
Stadium lights
String Lights and Temporary Light Stringers
Tank Cleaning Lights
Three Phase Motor Soft Starters
Vapor Proof LED Lights
Variable Frequency Drives (VFDs)
Vehicle Mounting Plates
Workboat Light Fixtures & Lighting Equipment
Yacht Engine Room Lights
Color Changing LED RGB Lighting
Explosion Proof Cord Reels
GOLIGHT Spotlights
Larson FUTURE - Lease Lighting
Remote Area Lighting and Scene Lights
Utility Bucket Mount, Receiver Hitch & Trailer Mount Lighting
Aevum Control Lighting and Equipment - IIoT
Butane and Solvent Extraction Room Lighting and Equipment
DC to DC Transformers and Power Supplies
Explosion Proof Fans & Blowers
Explosion Proof Paint Spray Booth Approved Lights
Explosion Proof String Lights
Explosion Proof Switchgear & Controls
Fleet Service Lights and Lighting Equipment
Industrial Equipment Trailers
Industrial Handlamps & Droplights
ISO 14644/FS-209E Clean Room Lighting
LED Blasting Lights
Night Time Fishing Lights
Portable AC Power Supply Units
Portable Power Distribution Panels
Power Distribution Panels with KVA Transformers
Self-Contained Lighting
Service Pit Lighting
Solar Generators & Solar Powered Lighting
Agricultural Farm Equipment Lighting & Beacons
Explosion Proof Cameras & Surveillance Systems
Explosion Proof Emergency Lights
Explosion Proof Heaters
Garage & Gas Station Canopy Lights
LED Grow Lights
LED Lights
NDT Ultraviolet Lights
Portable Hazardous Location Lighting
Radio Communication Towers and Equipment
Salt Water Processing Equipment
Shelter & Tent Lighting
Thermal Monitoring Cameras and Systems
48V LED Equipment Lights
ATEX Rated Explosion Proof Lights
Automotive Lighting
Class Rated Signals, Alarms, and Systems
Hazardous Location Area Lights and Portable Lighting
HID Equipment Lights
Hot Work Permit Lighting and Equipment
Hunting Lights
Industrial lasers
Industrial Transformers
Light Towers
Outdoor Lighting
Remote Security and Surveillance Systems
Temporary Construction Lights
Vehicle Mounted Spotlights
Equipment & Heavy Machinery LED Light Package Fitouts
Phase Converters - Single to Three Phase
Marine Shore Power Cords and Equipment
24 Volt Military Lights
Disaster Relief / First Responders / Search & Rescue Lighting
Plastic Handcuff Key
110/120 Volt Flood Lights
Post Mount Spotlights
Magnetic Work Lights
Crank-up Light Masts
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Intrinsically Safe Lights
Military Flashlights
LED Waterproof Lanterns
Work Area Lights
12 Volt Flood Lights
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Boat Spotlights
New Boat Lights
HID Boat Lights
Boat Dock Lights
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Remote Control Lights
Control Lights
Tow Lights
Magnetic Control Lights
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NEW Lights and New Products
Evaporative Coolers
Police Equipment
AC/DC Transformers
Power Supplies
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Military Spotlights 24V
Infrared Filters, Covert Covers, and Blackout IR Lenses
Military Equipment
Ultralife Batteries
Remote Control Pan Tilt Base
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Larson Electronics Spotlights
Larson Electronics Parts
Replacement Lamps
Cords - Brackets
Portable Wheeled Generators
Non-Hazardous Location Extension Cords / Plugs / Outlets
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HID Work Lights
HID Dive Lights
HID Off Road Lights
Acro Lights HID Lights
Halogen Lights
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Acro Light Flashlight
Xenon HID Flashlights
Powerlight Flashlight
HID Flashlights
Xenon Flashlights
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LED Status Lights
Forklift Lights
Tractor Lights
HID Post Mount Lights
Roof Mount Lights
Post Mount Light parts
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Flashlight Holder
Magnet Spotlight Base
Tripods-Magnetic Base
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Recharging Spotlights
Fire Rescue Lights
LED Street Lights
Utility Lights
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Hazard Lights
Strobe Lights - Battery Operated
Strobes & Beacons
Strobe Light Bars
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Headlights - Headlamps - Hard Hat Lights
Flashlights
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Suction Mount Lights
Magnetic Spotlights
12/24 Volt Spotlights
Gifts For Men
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New 12 / 24 Volt Lights
Explosion Proof Accessories and Replacement Parts
Explosion Proof Lighting
Explosion Proof Hand Lamps (Drop Lights)
Explosion Proof Lights - Stand/Dolly
Explosion Proof Tank Lights
Explosion Proof Phones and Intercoms
Explosion Proof Extension Cords
Black Friday & Cyber Monday Specials
Crane Lights
Explosion Proof Light Rentals
General Light Rentals
Light Tower and Light Plant Rentals
Power Distribution Rentals
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Power Plant Lighting
Refinery lights
Environmental Services Lights
Aerospace Lights
Chemical Plant Lights
Food Grade Safe Lights
Film and Entertainment Lights
Handheld Meters and Devices
Waste Water Treatment Lights
Mining Lights
Ship Yard Lights
Work Site Lighting
         

   
01/26/17 Why Dimming Bulbs Don’t Always Dim to Zero Percent

Article - January 26, 2016 By LarsonElectronics.com

Dimmable 12 watt LED Light Bulb - 120V LED A19 Style Replacement for Incandescent Lamps

Why Dimming Bulbs Don’t Always Dim to Zero Percent

Dimming is a functionality that is highly valued by individuals who are interested in custom lighting systems. Setting up smooth dimming features can be a daunting task, because there are several factors to take into consideration. Fixture-to-dimmer compatibility, electrical configurations and personal dimming preferences are just some issues that individuals must conquer when installing light dimmers.

With focus on personal dimming preferences, some people want to be able to dim their bulbs down to zero percent. But this feature isn’t always available, leaving some people scratching their heads.


Reaching Zero

Most bulbs don’t have a problem with dimming down to 60 or 40 percent. Issues start to surface when dimming down to single digit levels and ultimately zero percent. Incandescent and halogen bulbs can easily dim down smoothly to one percent with minimal effort and no noticeable flickering or buzzing. On the other hand, dimmable LEDs are prone to displaying inconsistencies in output when dimming at extremely low levels- usually 10 percent or lower. Dimming lights is a complicated process, because it requires the ballast or driver (depending on the type of fixture) to control the amperage and the voltage in a precise manner.

Most standard dimmers are designed to handle high electric loads that are commonly associated with traditional luminaries. Because of this, some dimmers have a difficult time “reading” or picking up low electrical loads, such as loads from an energy efficient LED bulb. When attempting to dim down to zero percent, the bulb may drop out or turn off, as it hits the lower range of the available settings. This happens because the setting of the dimming switch’s lowest voltage is lower, compared to the bulb’s voltage requirements during operation. As a result, dimming is limited to a minimal setting (for example, 15 percent); and attempting to dim down to a value lower than that setting would cause the light to turn off prematurely.

Failing to meet a dimmer’s minimum load may result in the following:

• Reduced dimming capabilities (range)

• Flashing

• Glowing (also known as ghosting)

• Flickering

• Inconsistent dimming features

Adhering to a dimmer’s minimum load is crucial to preventing drop outs at low settings. If one is unable to meet to such prerequisites, using a compatible dimmer that can operate at low electrical loads is another effective solution to this issue. Alternatively, some circumvent the problem by pushing an additional electrical load to meet the requirements of the dimmer.


Dimming Factors to Consider

Choosing a working dimmer requires addressing numerous factors during the buying process. Below are some tips on purchasing lighting products that can meet one’s dimming needs:

• Dimming levels: Before heading to the store, it is important to know the amount of dimming you need for the location. For example, a commercial lobby may only need dimming down to 20 percent, while a bedroom would require dimming down to zero percent.

• Bulb preferences: Not all lighting technologies handle dimming functions the same way. Furthermore, some dimmers only work with traditional luminaries and do not perform consistently (or lack compatibility) when paired with newer bulbs, like LEDs. Individuals should carefully note that all incandescent and halogen bulbs support dimming, but not all LEDs are dimmable.

• Check the load: Overloading or underloading a dimmer almost always leads to inconsistent performance and shortened lifespans. Be sure to check the suggested load requirements of the dimmer.

• Dimming technologies/methods: There are several dimming options available in the market today (forward phase control, trailing edge, DC dimming and etc.). Each type has its own set of advantages and limitations. In most cases, addressing the factors above will lead you to a specific type of dimming method that can handle your preferences

Most of the information you need, while purchasing the correct bulb and dimmer, can be found on the label of the units. Also, don’t forget to test the products inside the store before committing to the purchase.





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