Knowledge Base

A comprehensive collection of lighting related terms with complete and easy to understand explanations. It also includes all the frequently asked questions from our customers.You can browse by categories you are interested or you can search some information you want to know at knowledgebase by entering keywords in the search bar.

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  • Glossary of Lighting Terms
    • Lumen - Lm

      The lumen (symbol: lm) is the SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source. Luminous flux differs from power (radiant flux) in that radiant flux includes all electromagnetic waves emitted, while luminous flux is weighted according to a model of the human eye's sensitivity to various wavelengths. Lumens are related to lux in that one lux is one lumen per square meter.

      Lumen - Lm

      More on Wikipedia: LINK

    • Lux - lx

      The lux (symbol: lx) is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area.[1] It is equal to one lumen per square metre. In photometry, this is used as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface. It is analogous to the radiometric unit watts per square metre, but with the power at each wavelength weighted according to the luminosity function, a standardized model of human visual brightness perception.
      Illuminance is a measure of how much luminous flux is spread over a given area. One can think of luminous flux (measured in lumens) as a measure of the total "amount" of visible light present, and the illuminance as a measure of the intensity of illumination on a surface. A given amount of light will illuminate a surface more dimly if it is spread over a larger area, so illuminance (lux) is inversely proportional to area when the luminous flux (lumens) is held constant.

      Lux - lx

      More on Wikipedia: LINK

    • Watt - W

      The watt (symbol: W) is a derived unit of power in the International System of Units (SI) defined as 1 joule per second and can be used to quantify the rate of energy transfer. The watt is named after the Scottish scientist James Watt for his contributions to the development of the steam engine.

      In terms of electromagnetism, one watt is the rate at which work is done when one ampere (A) of current flows through an electrical potential difference of one volt (V).


      Watt - W

      Two additional unit conversions for watt can be found using the equation below and Ohm's Law.


      Watt - W

      More on Wikipedia: LINK

    • Ampere - A

      The ampere (SI unit symbol: A), often shortened to "amp" is the SI unit of electric current (dimension symbol: A) and is one of the seven SI base units. It is named after André-Marie Ampère (1775–1836), French mathematician and physicist, considered the father of electrodynamics.
      SI defines ampere as follows:
      The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one meter apart in vacuum, would produce between these conductors a force equal to 2×10−7 newton per metre of length.

      Ampere - A

      More on Wikipedia: LINK

    • Candela - Cd

      The candela (symbol: cd) is the SI base unit of luminous intensity; that is, luminous power per unit solid angle emitted by a point light source in a particular direction. Luminous intensity is analogous to radiant intensity, but instead of simply adding up the contributions of every wavelength of light in the source's spectrum, the contribution of each wavelength is weighted by the standard luminosity function (a model of the sensitivity of the human eye to different wavelengths). A common candle emits light with a luminous intensity of roughly one candela. If emission in some directions is blocked by an opaque barrier, the emission would still be approximately one candela in the directions that are not obscured.
      The word candela means candle in Latin.

      Candela - Cd

      More on Wikipedia: LINK

    • Kelvin - K

      The kelvin is a unit of measure for temperature based upon an absolute scale. It is one of the seven base units in the International System of Units (SI) and is assigned the unit symbol K. The Kelvin scale is an absolute, thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics. 

      The Kelvin scale is named after the Belfast-born, Glasgow University engineer and physicist William Lord Kelvin (1824–1907), who wrote of the need for an "absolute thermometric scale". Unlike the degree Fahrenheit and degree Celsius, the kelvin is not referred to or typeset as a degree. The kelvin is the primary unit of temperature measurement in the physical sciences, but is often used in conjunction with the Celsius degree, which has the same magnitude. The definition implies that absolute zero (0 K) is equivalent to −273.15 °C (−459.67 °F).

      T(K) = T(°C) + 273,15 K

      Kelvin - K

      More on Wikipedia: LINK

    • Voltage - U

      Voltage, electric potential difference, electric pressure or electric tension (as V or U, for instance in the context of Ohm's or Kirchhoff's laws) is the difference in electric potential energy between two points per unit electric charge. The voltage between two points is equal to the work done per unit of charge against a static electric field to move the test charge between two points. This is measured in units of volts (a joule per coulomb).

      Voltage can be caused by static electric fields, by electric current through a magnetic field, by time-varying magnetic fields, or some combination of these three. A voltmeter can be used to measure the voltage (or potential difference) between two points in a system; often a common reference potential such as the ground of the system is used as one of the points. A voltage may represent either a source of energy (electromotive force) or lost, used, or stored energy (potential drop).
      Common voltages supplied by power companies to consumers are 110 to 120 volts (AC): USA, Mexico, Cuba, Canada, Brazil, ect. and 220 to 240 volts (AC): Europe, South and North Korea, China, India, Australia, ect.

      Voltage - U

      More on Wikipedia: LINK

  • Orders
    • I want to cancel my order

      You will be able to do it. For the exact conditions and consequences of the cancellation of the contract, read our terms and conditions governing this area: RECLAMATIONS AND RETURNS
      If you are eligible for cancellation of the contract, do this in the following ways:

      • If the order has not yet shipped, you simply obvestiš using the contact form.
      • If you already received an order, we need first to send: FORM FOR CANCELLATION

      Any further proceedings, the buyer is informed within a few days.

  • Delivery
    • Do you deliver abroad?

      Yes, we deliver abroad. In the EU, the US and also in all other parts of the world. For delivery using proven and reliable delivery service.



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