Low voltage art lighting fixtures are manufactured in a wide range of fixture, bulb, and lamping styles. Some fit over the picture frame and spread illumination downward and across the surface of the image. Others reside in the ceiling itself or suspend from tracks parallel to the surface of the wall. Still others mount on the underside of the ceiling and project a field of apparently sourceless light for lighting pictures or even a three-dimensional sculpture lighting.
Far safer and more cost effective than high voltage light sourcing, low voltage lighting offers art consultants, museum collectors, office and home interior decorators, and private art collectors a highly eclectic and adaptive range of equipment options.
Fixture selection really depends upon both the environment in which the collection is found and the nature of the art collection itself. Low voltage lighting is incredibly safe and cost effective, and with a commercial grade manufacturer and the right professional consulting and installation service, adaptable to virtually any eclectic, commercial, or residential environment.
Low voltage art lights make it easier to minimize, if not completely eliminate, infrared and ultraviolet lights. IR light creates heat, which can dry out many forms of paint such as acrylics and watercolors. UV light has a destructive impact on all forms of paint, and it is the most notorious enemy of premium-grade oils and original canvases.
Low voltage art lighting fixtures utilize a number of tools to eliminate these harmful light rays. Almost recessed halogen lights come equipped with IR and UV filters to reduce the excessive heat their bulbs produce. Picture lights increasingly are now being manufactured with LED bulbs that burn cool and give off no UV light whatsoever, and track lights controlled by dimmer switches allow lighting and power levels to be controlled directly by the user.
All low voltage accent lights, with the exception of battery powered LED's, use transformers to convert 120VAC to 12VAC power. Because they use only 1/10th the power as high voltage lights, 12VAC fixtures make for better sources of illuminating exhibitions or residential decorative settings where the lights have to be left on longer than 12 hours at a time.
There are many different types of low voltage art lighting fixtures on the market, and an almost infinite number of fixtures styles available within individual type.
Low voltage over the picture lights
These lights install directly over the picture by attaching to the frame. Currently, the most popular over the picture art lights are low voltage LED accent lighting units that either operate with a concealed transformer or eliminate wiring altogether with internal battery power.
These cordless picture lights, powered LED's are remarkably inexpensive, safe, and easy to install and transport. Their only disadvantages are limited battery life and the obvious visible presence of a fixture--no matter how decorative it may be--protruding out from the frame. This does not work very well in formal settings, but on the flipside often proves invaluably convenient to public art sales and many municipal displays where local art or classroom art from local schools is publicly showcased.
Low voltage art lighting with recessed fixtures
Recessed lights are so named because they resided in a recessed fixture that is either partially or completely embedded in the ceiling. Recessed picture lights can be fitted with dimmers to allow the user direct control over lighting levels. They can also be fitted with filters to eliminate UV and IR radiation, placing only the desired portions of the spectrum over the piece.
The primary advantage of recessed lights is a concealed light source that can be projected at a precise angle toward a picture(s) on display.
The disadvantage of low voltage recessed art lights is that multiple fixtures must be used to light an entire row of pictures, or a large number of pieces along a wall. If there are too many works in the collection, it becomes impractical to install an equivalently large number of recessed lights in the ceiling. In these settings, track lights are usually a preferred choice for low voltage art lighting.
Low voltage art lighting with track lights
Track lights are so called because they hang suspended from a track that runs parallel to a wall.
They offer an advantage in number over recessed lights. In a gallery where a wall may be full of paintings or photographs from a specific genre, any number of track lights can be installed to provide an individual light source for each individual work.
The obvious disadvantage to track lighting is lack of concealment. Track lights are clearly visible and the more fixtures a track contains the more visually obtrusive they become.
Low voltage lighting with Art projectors
Art Projectors lights represent the highest level of sophistication in low voltage art lighting. They hang suspended on pedestals that normally install in the middle of the ceiling. Because they are capable of a full 360 degrees of rotation, art projectors can be aimed at any point in the room to illuminate a two dimensional image or three dimensional sculpture.
Most contain some sort of filtration technology as well that strips the light beam of IR and UV wavelengths prior to the light ever passing through the lens. Most feature as well some method of adjusting the lenses to focus the width of the beam spread and to control the brightness of the light itself.
However, many framing projectors are limited by a fixed optical system that prohibits fine-tuning adjustments known as ?key stoning??a technique lighting designers use to eliminate glare and frame shadows. Others are bulky and clearly visible hanging from the ceiling and present an inconvenient challenge to rotate and fine tune. This can result in a ?fuzzy? lighting effect, or it can create light ?spillage? beyond the boundaries of the frame.
To achieve the level of precision adjustment necessary to completely shape the light to the exact dimensions of the artwork itself, it is necessary to use a projector such as the Phantom Contour that will allow the shutter blade system to be locked into a specific position. This then allows the light beam to shape itself to the piece. Custom templates and internal filtering mechanisms within projector allow low voltage light to pass invisibly from the lens to the art, showing itself only at the last minute as a field of illumination that appears to magically radiate from the painting or sculpture itself.
Low Voltage Lighting Transformers
The use of low voltage lighting systems has become increasingly popular over the past several years. Low voltage halogen and low voltage xenon lighting systems can be found in almost any setting – restaurants, hotels, bars, retail stores, museums, art galleries, offices, and the home. We have all seen these types of lighting systems in the form of cabinet lighting, cove lighting, landscape lighting, picture lights, regular track lighting, flexible track lighting (sometimes referred to as monorail lighting), cable lighting, and under cabinet lighting. Here are 15 things that you should know about these low voltage lighting systems.
1) Low Voltage A low voltage lighting system usually operates on 12 or 24 volts.
2) Transformer A transformer is generally used with low voltage lighting systems to “transform” the standard voltage that is normally available (usually 120 volts or 277 volts) to either 12 volts or 24 volts.
3) Type of Transformer The transformer used in a low voltage lighting system may be either electronic or magnetic.
4) Maximum Transformer Wattage The wattage rating of the transformer should always be equal to or greater than the total wattage of the lighting system. If an electronic transformer is used, then the maximum wattage of the lighting system may be equal to but not greater than the wattage rating of the electronic transformer. If a toroidal magnetic transformer is used, then the maximum wattage of the lighting system may be equal to but not greater than the wattage rating of the toroidal magnetic transformer. If, however, a conventional EI magnetic transformer is used, then the maximum wattage of the lighting system may be equal to but not greater than 80% of the wattage rating of the conventional EI magnetic transformer.
5) Minimum Transformer Wattage Transformers usually have a minimum wattage that they must power before they work. For example, it is not uncommon for 60-watt electronic transformer to require that there be at least 10 watts of lighting load and if there is only 5 watts of lighting load connected to this 60W electronic transformer, the lighting system will not work.
6) Electronic Transformers An electronic transformer is generally lighter in weight, smaller in size, cooler to operate, and quieter than a magnetic transformer. However, electronic transformers cannot provide more than 300 watts of power whereas some magnetic transformers can provide as much as 1200 watts of power.
7) Voltmeter Readings Because an electronic transformer provides its power at very high frequencies (usually greater than 20,000 Hertz) a standard voltmeter cannot be used to accurately measure the output voltage. Instead, a “true RMS” voltmeter must be used to measure the secondary voltage of an electronic transformer.
8) AC Electronic Transformer An AC (alternating current) electronic transformer should not be placed any farther than 10 feet from the lighting system. If it should be placed farther away than 10 feet from the lighting system, part or all of the lighting system will experience a lower voltage (known as voltage drop) and have dimmer lamps. Also, the longer the distance from the AC electronic transformer and the lighting system, the greater the chance that it might create radio frequency interference (RFI) with other electronic components in the area.
9) DC Electronic Transformer A DC (direct current) electronic transformer may be placed as far as 50 feet from the lighting system. The DC output significantly reduces radio frequency interference (RFI) and virtually eliminates the possibility of any voltage drop (the drop in voltage over a long circuit).
10) Toroidal Magnetic Transformer If a magnetic transformer is used to power a low voltage lighting system, a toroidal magnetic transformer should be considered. This type of magnetic transformer is more efficient, lighter in weight, smaller in size, cooler to operate, and quieter than a conventional EI magnetic transformer.
11) Wiring a Dimmer A low voltage lighting system can be dimmed whether it is powered by an electronic or a magnetic transformer. When using a dimmer with a low voltage lighting system the dimmer should always be installed so that it is controlling the line voltage side of the transformer, which is also called the primary side or the side connected to 120 volts or 277 volts.
12) Type of Dimmer The dimmer selected to control an electronic transformer should be specifically designed to control that type of transformer whereas a dimmer selected to control a magnetic transformer should be specifically designed to control that type of transformer.
13) Electrical Connections All of the electrical connections for a low voltage lighting system must be very tight and secure. If an electrical splice is not very tight and secure, the wires may arc, cause a great deal of heat, cause the entire lighting system to fail, and possibly become a fire hazard.
14) 24-Volt Lamps When using a 24-volt transformer make certain that the lamps are rated for 24 volts - not 12 volts. If 12-volt lamps are used with a 24-volt transformer the lamps will burn out immediately and possibly become a fire hazard.
15) Thicker Wires Low voltage lighting systems require thicker wires (lower gauge) since more electricity is being conducted by those wires. For example, a 300-watt lighting system operating at 12 volts uses 25 amps of electricity on the low-voltage side of the transformer whereas this same transformer may be powered by 120 volts and 2.5 amps of electricity on the line voltage side of the transformer.
Both Russell Neal & Tom Farin are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.
Russell Neal has sinced written about articles on various topics from Home Management, Architecture and Arts. Phantom Lighting manufactures proprietary, high-end art projectors and custom linear strip lights for residential and commercial fine art and display lighting purposes. Visit. Russell Neal's top article generates over 40500 views. to your Favourites.
Tom Farin has sinced written about articles on various topics from Bathroom Lighting, Home Management. . Tom Farin's top article generates over 2400 views. to your Favourites.
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