We have provided the information below to help you with your lighting choices. We are always pleased to help you my email or by phone as well, and if necessary for larger schemes it is possible to send a JCC Engineer to advice you, but this needs to be pre agreed and arranged in advance.
Index to the above Picture
- Wattages (VA) – A measure of the energy consumed by a light fitting
A measure of power or the rate of energy consumption of any electrical device when it is in use, calculated by multiplying the units voltage at which an unit operates by the current it draws (Watts = Volts X Amperes).
- Lumens – A measure of light output in light fittings
A lumen is a unit of measurement that is used to indicate how much illumination a light lighting or other source provides.
- Light output Ratio (LOR) – The amount of usable light entering the room
Describes the amount of usable light entering the room by calculating the light lost within the light fitting.
- Lumens per circuit watt (LpcW) – The efficiency of the light fitting
A calculation of the efficiency of a light fitting. Lumens (3000) ÷ Wattage (50W) = 60lpcW
- Lux – A measure of light intensity
A measure of the intensity of light as seen by the human eye and is measured by luminous flux per unit area. One lux is equal to one lumen per square metre.
Explanation of IP numbers for degree of protection (Example: IP65)
Ingress Protection (IP) is a value given to products that have particular protection against dust and/or moisture. The IP number is split, the first digit represents the level of protection against dust particles while the second digit represents the protection against moisture. For example IP00 has no protection against dust or moisture whilst a product with IP68 is dust tight and submersible up to 2M.
||Short Description – Example IP6X
||Short Description – Example IPX5
||Protected against solid objects greater than 50mm
||Protected against dripping water
||Protected against solid objects greater than 12mm
||Protected against dripping water when tilted up to 15º
||Protected against solid objects greater than 2.5mm
||Protected against spraying water
||Protected against solid objects greater than 1.0mm
||Protected against splashing water
||Protected against water jets
||Dust – tight
||Protected against heavy seas
||Protected against the effects of immersion
||Protected against submersion
Understanding lighting colour temperatures
The colour temperatures of a light bulb or fitting or other source is measured in degrees of Kelvin. Below is the Kelvin temperature chart with examples of how colour temperature is used within different lighting applications.