+44 (0) 1229 432 414 info@lumier.co.uk

LED v Halogen

LED V Halogen Lighting

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LED street/parking lot lights offer substantial energy savings compared to High Pressure Sodium (the common type of HID lights used for street lighting) However, as explained below, calculating LED efficiency for this type of lighting requires a clear understanding to what is important when it comes to area illumination of this nature.  System efficiency is measured with the lamp installed in a luminaire (which is, essentially, the entire lamp).   It is based on how many lumens actually reach the target area, not simply how many lumens are emitted from the lamp.  System efficiency is always lower than source efficiency due to three primary sources of light and power loss when a lamp is installed in a luminaire:







Here is a summary comparison:


HID lamp:  Source efficiency is typically 120 lumens/watt or higher.  However, losses from trapped light, protective covers and lenses, inefficient ballasts and unfavourable operating temperature typically result in a measured system efficiency of 30 lumens/watt or less.



LED street lighting does, of course, possess the usual benefits of reduced power consumption cost (at least 50%), reduced bulb cost (over 50%) reduced maintenance costs (over 50%), immediate illumination without a warming up period, and cleaner, better illumination in terms of light quality in comparison to HID lights.


Contact us today


Lumier Ltd
County Park Trading Estate
Park Road
LA14 4BQ


Tel: +44 (0)1229 432414
Fax: +44 (0)1229 821104




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