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Category » Product Related Questions
Information Related to Products
There were 29 articles found in this category:
Linear Calculator
How much area do you have? Square or Rectangle Length (feet) Width (feet) ...- What is a Kelvin?
Kelvin is a unit of temperature starting from absolute zero, parallel to the Celsius (or Centigrade) scale. 0C is 273K.
- What are the measurements of the oversized wall plates?
What are the measurements of the oversized wall plates? Oversized wallplates are 0.75 inches higher and wider than standard wallplates. They are used to conceal greater wall irregularities than those hidden by the extra coverage provided by Midway wallplates. All 1-Gang Oversized wallplates ...
- What is Static Pressure?
What is Static Pressure Static pressure is a measure of the resistance against airflow as the fan pushes air through a duct. It is measured in inches of water column or water gauge, such as 0.25" w.g. to show that resistance is equal to a column of water gauge. It is expressed as 0.1" w.g. or 0 ...
- What is BTU?
What is BTU? BTU or British Thermal Unit, is a unit of measure for heat value. The higher the BTUs a device is capable of outputting the more powerful it is.
- What is CFM?
What is CFM? CFM (Cubic Feet per Minute) is the standard of measure for devices such as ventilation fans. The higher number of CFM a fan has the more air it is able to move in a given period of time.
- Why do fluorescent lamps need a ballast?
Why do fluorescent lamps need a ballast? Ballasts are used to regulate the current in the lamp. Current needs to be regulated in order to supply the right amount of power needed to make the arc, and thus the light, in a fluorescent lamp. Fortunately, the current is lower than that needed for a t ...
- What is the difference between line voltage and low voltage?
What is the difference between line voltage and low voltage? Line voltage in the United States is 120 volts. It is the voltage that is supplied to your home or office. Low voltage is less than the supplied voltage. Some lamps, like MR16 lamps, run on low voltage. Getting low voltage to lamps req ...
- What is a Nanometer?
A unit of wavelength equal to one billionth of a meter
- What is the National Stock Number?
The standardized part number used by the US Government for procurement.
- What is the Ignitor for?
An Ignitor is an electronic device providing a high voltage pulse to initiate an electrical discharge. Typically, the ignitor is paired with or is a part of the ballast.
- What is the Hot Restart Time?
The time it takes for a High Intensity Discharge lamp to reach 90% of light output after going from on to off and then back on.
- What does HPS mean?
HPS means High Pressure Sodium. HPS lamps are high intensity discharge light sources that product light by an electrical discharge though sodium vapor operating at relatively high pressures and temperatures.
- What does HPF mean?
A ballast whose power factor is corrected to 90% or greater by the use of a capacitor is a HPF ballast.
- What is a High Efficiency Magnetic Ballast?
The proper term, High Efficiency (Energy Saving) Electromagnetic Ballast, is a ballast with a core & coils, designed to minimize ballast losses compared to the "standard" ballast.
- What is the Hot Restart Time?
What is the Hot Restart Time? The time it takes for a High Intensity Discharge lamp to reach 90% of the light output after going from on to off and then back on.
- What is LED? Light Emitting Diode (LED)
A solid that directly converts electrical impulses into light. Some LED's today incorporate fluorescent materials to change the color characteristics of the emitted light.
- What is Light Loss Factor?
The product of all factors that contribute to lowering the illumination level including reflector degradation, dirt, lamp depreciation over time, voltage fluctuations, etc.
- What is Light Pollution?
Light that is directed to areas where it is not needed, and thereby interferes with some visual act. Light pollution directed or reflected into the sky creates a "dome" of wasted light and makes it difficult to see stars above cities.
- What are Lumens?
A measure of the luminous flux or quantity of light emitted by a source. For example, a dinner candle provides about 12 lumens. A 60-watt Soft White incandescent lamp provides about 840 lumens.