Commercial & Industrial Lighting
Technical Information
Glossary
General Terms
- Lumen Output symbol: lm
- The SI unit of luminous flux. A quantity of light emitted by a source i.e.: A lamp.
- Illuminance symbol: E Unit: lux
- The luminous flux at a point on a surface.
- Lux symbol: lx
- The unit of illuminance, equal to one lumen per square metre.
- Lumens per Watt
- The ratio of light emitted by a lamp to the power consumed by the lamp.
- FFL
- Finished Floor Level.
- WP
- Working plane (The surface or level on which light is measured).
- Maintenance Factor
- The method for calculating light loss after installation.
- RSMF (Room Surface Maintenance Factor)
- Calculates the loss of light from reflective surfaces such as floors and walls.
- LMF (Luminaire Maintenance Factor)
- Considers the loss of light from a luminaire after a given usage due to dirt disposition.
- LLMF (Lamp Lumen Maintenance Factor)
- The proportion of the initial light output of a lamp produced after a given time.
- Non-Maintained Emergency Lighting
- A luminaire incorporating one or more lamps which function from the emergency supply only upon full mains failure.
- Maintained Emergency Lighting
- A luminaire incorporating one or more lamps which function from both mains and emergency supply.
- Combined Emergency Lighting
- A luminaire incorporating two or more lamps, one of which only functions from the emergency supply.
Ingress Protection
IP Rating
Ingress Protection - the IP code followed by two significant digits shows the fixture protection against solid bodies and liquids. Degree of protection (IEC 529 publication). First digit against solid bodies and electric shocks. Second digit against ingress of water.
Initial Number
- Solid objects over 50mm
- Solid objects over 12mm
- Solid objects over 2.5mm
- Solid objects over 1mm
- Harmful deposits of dust
- Any ingress of dust
Secondary Number
- Dripping water
- Dripping water when enclosure tilted up to 15˚
- Water sprayed 60˚ from the vertical
- Water splashed from any angle
- Water propelled by jets
- Water from heavy seas
- Immersion to a depth of 1m
- Total immersion
Quality – Fitzgerald Lighting is committed to providing customers with in-depth quality products. Our policy is to manufacture and supply only products that ensure safety, quality, performance and reliability.
Resistance Table
Chemical resistance information for guidance purposes only.
| Chemical Material Investigated | Aluminium | Glass Reinforced Polyester | Acrylic | Polycarbonate | Stainless Steel |
|---|---|---|---|---|---|
| Acetic Acid up to 5% |  |
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| Acetic Acid up to 15% |  |
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| Acetone | |
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| Alcohol up to 30% |  |
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| Alcohol concentrate | |
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| Ammonia 25% | |
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| Aniline | |
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| Aromatic Hydrocarbons | |
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| Battery Acid | |
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| Benzene | |
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| Carbon Dioxide | |
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| Carbon Monoxide | |
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| Carbon Tetrachloride | |
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| Caustic Soda 2% | |
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| Caustic Soda 10% | |
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| Chloroform | |
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| Common Salt | |
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| Crude Oil | |
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| Diesel Oil | |
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| Dioxane | |
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| Ether | |
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| Ethyl Acetate | |
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| Glycerine | |
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| Glycol | |
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| Hydrobromic Acid | |
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| Hydrocarbons | |
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| Hydrochloric Acid 5% | |
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| Hydrochloric Acid 30% | |
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| Hydrochloric Acid 96% | |
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| Hydrogen Peroxide 40% | |
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| Hydrogen Peroxide over 40% | |
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| Hydrogen Sulphide | |
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| Ketones | |
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| Lysol | |
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| Metal Salts and their aqueous solutions | |
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| Methanol | |
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| Methylene Chloride | |
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| Milk of Lime | |
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| Nitric Acid 5% | |
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| Nitric Acid 30% | |
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| Nitric Acid concentrate | |
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| Petrol | |
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| Petroleum Ether | |
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| Phenol | |
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| Pyridine | |
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| Sea Water | |
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| Soap Suds | |
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| Soda | |
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| Sulphuric Acid 5% | |
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| Sulphuric Acid 30% | |
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| Sulphuric Acid concentrate | |
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| Sulphurous Acid 5% | |
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| Synthetic detergent | |
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| Turpentine | |
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| Water up to 70ºC | |
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| Xylene | |
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Key
- Resistant
- Resistant within limits
- Not resistant