GENIE: Considerations for Light Tower Placement


Customers often ask these two questions: How much light they need for a particular type of jobsite, and how much light output comes from a light tower that is used on site? OSHA (Occupational Safety and Health Administration) takes a bit of the mystery out of part of this by giving general guidelines for lighting in various types of worksites. For example, OSHA says that areas where tasks like excavation and concrete work take place, a minimum of 3 foot-candles of light is required. These guidelines also state that a general construction plant should have 10 foot-candles, and a first aid area or office setting should be at 30 foot-candles minimum.

Ok, that’s great, but what are foot candles exactly?

Foot-candles are a unit of light intensity. A fancy definition would be “a unit of illuminance on a surface that is everywhere one foot from a uniform point source of light of one candle and equal to one-lumen-per-square-foot.” A simpler explanation would be “a measure of intensity of light falling on a surface.”

Now, we are getting somewhere. But what about lumens? Lumens are a unit which quantifies the amount of light energy emitted by a light source. To tie foot-candles and lumens together, foot-candles equal the amount of lumens-per-square-feet of area.

Let’s bring this back to light towers. These light sources come in a range of heights, and lights are often adjustable at various angles and orientations. Charts are available for individual lights, and those can be used as a starting point for determining what area can be illuminated and at what levels.

The example below shows the light pattern for the new Terex RL4 vertical mast tower, equipped with round lights. These are positioned at 23.4 ft, which is the max tower height. Measurements are given with the lights at an angle of 5° from horizontal, pointed down.


The red area shows that the RL4 light tower at full height gives an area just shy of 3,400 sq-ft that is at 10 foot-candles. The outside blue portion is at 0.5 foot-candles and has an area approximately 38,000 sq-ft.

Going back to the OSHA standard, this light tower would be a good option to illuminate a construction plant (which required 10 foot-candles) needing light in an area just under 3,400 sq-ft. If the work area was larger, another light tower could be placed nearby to illuminate a greater area.


Recent News

Versatile Carmix takes concrete to North Mara Gold Mine in Tanzania
    The gold mine in North Mara is situated in the north-west of Tanzania, at about 100 kilometres east of Lake Victoria and 20 kilometres south of the border with Kenya. The gold mine works an average of 8,000 tonnes of minerals a day and produced 287,188 ounces of gold in 2015. The gold
Workers’ Memorial Day, observed each year on April 28, honors workers killed, injured, or made ill at work. Since 1992, BLS has collected data on both nonfatal work injuries and illnesses that result in days away from work, and fatal work injuries. In 2015, the occupations with the highest number of nonfatal injuries and illnesses
The undercarriage of a machine represents a significant portion of a piece of equipment’s purchase price. Proper maintenance and operation practices are critical for protecting your equipment investment. Undercarriage maintenance is critical to the overall productivity of a machine. It is the mechanism that gives tracked machines much of their power and stability. It also
Deere Adds 8-Year / 20K Hour Warranty on 944K Electric-Drive Components
John Deere is now offering a 96-month / 20,000-hour power electronic components warranty on the Deere 944K hybrid wheel loader. The warranty is retroactive to existing machines in the field and provided on new 944K loaders through October 31, 2018. The warranty includes a 96-month (eight-year) or 20,000-hour (whichever comes first) non-prorated assurance on wheel
  Vermeer’s Silver Series drill rod is composed of S135 common grade steel and is threaded in the same facility as the company’s Firestick drill rod with the same column wall thickness. The Silver Series drill rod is available in four sizes: 1.66-inch, 1.9-inch, 2.06-inch, and 2.375-inch, for use on the D7x11 through the D24x40
CHILE: Construcción regional cae 7,5% y suma dos meses con cifras en rojo
Datos de Cámara Chilena de la Construcción estimaron retroceso de 7,5% en febrero que se suma al -10% de enero. Se busca consolidar esfuerzos público-privados para enmendar el rumbo. Por primera vez desde el año 2002, cuando se comenzó a publicar el Índice de Actividad de la Construcción Regional (INACOR), la Región de Coquimbo inicia

About Us

In Tractopart we supply quality construction Parts and Heavy Equipment Parts with excellent discount rate for New , Used Rebuilt & Surplus parts for excavators, Wheel loader dozers, and undercarriage for all heavy equipment brands, we are locate in Miami, Fl

Contact Info


At Tractopart we focus on providing high quality parts at a great price. Our parts are subjected to rigorous inspection procedures that allow us to ensure product quality.

Phone: 786.219.1010
Main Office: 3505 South Ocean Drive #204
Hollywood, FL 33019