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Tegral Lighting

Manufacturers of high quality and reliable lighting products in United Kingdom, Ireland and Germany.

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Technical Information

Bathroom Zones

There are 4 zones to bathroom lighting that need to be considered when fitting a bathroom as the regulations become much stricter.

  1. The inside of the bath or shower basin
  2. Area above bath or shower basin
  3. Within 0.6m of the edge of the bath or shower basin edge
  4. Outside zones 0, 1 & 2

CIBSE Lighting Levels

CIBSE – The Chartered Institute of Building Service Engineers

AreaLux
Offices500
Small Retail Stores500
Supermarkets750
Hypermarket1000
DIY Stores1000
Showrooms500 – 750
Changing Rooms and Toilets100
Restaurants and Canteens200
Food Prep Area500
Entrance Halls200
Enquiry Desks500
Corridors and Stairs100
Classrooms500
Warehouse Picking Area300 – 350
Warehouse Racking and Storage200 – 250

Corrosive Areas Defined

Corrosion Classes

The corrosion classes below describe – with examples – under which conditions treatments for iron and metal are providing sufficient corrosion protection.

ISO 12944ImpactInteriorExterior
C1Very LowHeated buildings with clean air, such as offices, shops, schools, hotels, etc.None
C2LowBuildings not heated, where condensation may occur, such as warehouses and sports halls.Atmosphere with low pollution. For example in the country.
C3MiddleBuildings for production with high atmospheric humidity and some air pollution such as food manufacturers, breweries, dairies and laundries.Urban and industrial areas, moderate sulphur dioxide pollution. Coastal areas with low salt content.
C4HighChemical manufacturers, swimming baths and ship and boatyards by the sea.Industrial areas and coastal areas with moderate salt impact.
C5-IVery High – industryBuildings or areas with almost permanent condensation and with high pollution.Industrial areas with high humidity and aggressive atmosphere.
C5-MVery HighBuildings or areas with almost permanent
condensation and with high pollution.
Coast and offshore areas with high salt content.

Comment( DS Manual 124:2000)
Corrosion categories C1 og C2 do not exist in Denmark. Due to the prevailing wind conditions at the Danish west coast, corrosion category C5M may occur as far as 25 km inside the country.

IP Ratings and Colour Temperatures

IP Ratings Explained

An IP rating is a system which allows us to understand how well protected a light fitting is against various elements. It starts with the letters IP (Ingress Protection) meaning how well protected it is, followed by 2 digits.
The first digit indicates how secure a fitting is against solids such as larger airborne contaminates and dust. The second digit indicates the protection against liquids and moisture.
The lower the number following the IP, the less protection it has. The scale of numbers goes from 0-6 for the first digit and 0-8 on the second digit.

First Digit ScaleSecond Digit Scale
Fixture completely unprotected0Fixture completely unprotected
Fixture protected against solid objects larger than 50mm1Protects against dripping water
Fixture protected against solid objects greater than 12mm dia2Protects against dripping water when tilted to 15 degrees
Fixture protected against solid objects with a minimum 2.5mm dia3Protects against spraying water when tilted to 60 degrees
Fixture protected against object 1mm dia or more4Protects against spray from all directions
Dust protected. Limited ingress of dust permitted.5Protected against jets of water. Limited ingress permitted.
Fixture completely dust proof6Protected against strong jets of water. Limited ingress
permitted.
7Protection against the effects of immersion in water be- tween 15cm and 1mtr for 30 mins.
8Protection against the effects of immersion in water under
pressure for long periods.

Colour Temperatures Explained

Colour temperatures in LED are measured comparative to a black body at a specific colour temperature in degrees kelvin (k).

2700kVery warm whiteGives a warm and “tranquil” feel
3000kWarm whiteSlightly whiter than a glow effect
3500kWhiteStandard colour for most fluorescent tubes
4000kCool whiteMore illuminating white mainly used in offices
6500kDaylightSharp, crisp and cold colour for clinical use
8000kSkywhiteSpecialised lighting with blue tones

LED Definitions

CRI – Colour Rendering Index. This term indicates the colour shift that matters experience when lighted by a source of
light. The higher the CRI rating, the more natural and crisper the colour with reduced amount of glare.

DID – Direct Indirect. Light is cast upward and downwards from the fixture

DLOR – Downward Light Output Ratio. This is the LOR for the direct light only

Energy Efficiency – Energy efficiency is a measurement of a lowered consumption of energy whilst giving off the same light output

L70 – This denotes the percentage of lumen output following standard degradation e.g L70-30% degradation, L80-20%
degradation, L50-50% degradation and L90-10% degradation. L70 is most commonly used as the human eye
cannot detect reduction of light output until it has reduced by 30%

LED – Light Emitting Diode

LOR – Light Output Ratio. This is the measurement of light output when the fitting housing and diffusion is taken into
account

Lumens per Circuit Watt (LpcW) – Amount of lumen output per wattage. This is a division of the lumen output by the consumption of the fitting

LUX – The light level measured at any given distance from the luminaire. 1 lux = 1 lumen per m²

Primary Lumen Output – The output of a fitting before a cover goes on

RoHS Compliant – Restriction of Hazardous Substances

Secondary Lumen Output – The output of a fitting after a cover goes on

Self-Test Emergency – The self-test circuit is set to interrupt the mains supply at different intervals to initiate emergency lighting tests

T5/T8 – Relates to the size of the tube. T5 is 5/8” of an inch diameter. T8 are 1 inch diameter

UGR – Unified Glare Rating. UGR is a specific formula designed to establish the amount of glare a fitting gives off

Sensors

Corridor Function – Detects motion and dims down to 10% when no presence is detected

PIR – Passive Infra-Red. Detects motion through a disturbance in the infra-red signal

High Bay PIR – As above for fittings with a mounting height of 5 metres or more

Microwave – Detects sound wave

High Bay Microwave – As above for fittings with a mounting height of 5metres or mo

Photocell – Detects light levels and switches on and off accordingly

Sensor Loads

Inductive – Typically used for fluorescent

Resistive – Typically used for incandescent

These are the maximum total wattage a sensor can operate. For LED, allow 80% of the inductive total

2020 Catalogue now available

View Catalogue
Tegral 2020 catalogue

UK

Unit 4 Myson Way,
Raynham Rd Ind Est
Bishops Stortford,
Herts, CM23 5JZ

T: +44 1279 461888 /898/908
F: +44 1279 460115
E: salesuk@tegral-lighting.com

Ireland

Unit 99 Barrow Road,
Dublin Ind Est,
Glasnevin, D11


T: +353 1 8309684 /85/86
F: +353 1 8309932
E: sales@tegral-lighting.com

Germany

Zur Weilershecke 19,
54317 Osburg,
Deutschland


T: +49 6500-91777-07
F: +49 322-2244-2373
E: salesde@tegral-lighting.com

Netherlands

Dutch Light Trading,
Distributieweg 15,
2742 RB Waddinxveen


T: +31 (0)182 23 21 20
E: sales@d-lt.nl

Scotland

Blackmoon Lighting
New Eclipse House,
Unit 8 Dryden Pl,
Loanhead,
Edinburgh EH20 9HP

T. +44 1314480305
E: info@blackmoonlighting.com

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UK registered company number: 07562015
UK registered address: Unit 4 Myson Way, Bishops Storford, Herts, CM23 5JZ

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