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Bridgewater Place, Leeds


  • Bridgewater
  • Lamp efficacy

    Lamp efficacy

    Ensuring the lamp efficiently converts electricity into light (lm/W).

  • Ballast classification

    Ballast classification

    Controlling the electricity supply to the lamp (Energy Efficiency Index).

  • Luminaire distribution

    Luminaire distribution

    Controlling light emission using optics which bend and shape the light to the correct location.

  • System efficacy

    System efficacy

    Combining optical and thermal control within the luminaire (luminaire lm/W).

  • Presence/absence detection

    Presence/absence detection

    Presence: Lights automatically turn on/off with movement. Absence: Lights automatically turn off and must be manually switched on.

  • Daylight detection

    Daylight detection

    Artificial lighting which responds to the natural light conditions.

  • Constant illuminance

    Constant illuminance

    A function designed to produce correct light levels for the duration of the maintenance period.

  • Task-scene setting

    Task-scene setting

    Allowing the user to set scenes and adapt the lighting to different tasks.

  • Timed off

    Timed off

    Automatic cut-off can be installed to turn all lights off during unoccupied hours.

  • Task lighting

    Task lighting

    Lighting task areas with the correct amount of light.

  • Zoning of lighting

    Zoning of lighting

    Lighting is zoned according to area use.

  • Maintenance schedule

    Maintenance schedule

    Maintenance must be performed in response to product age, performance and environment.

  • Waste light

    Waste light

    Eliminating waste light which does not hit the intended target.

  • Reflectance


    Taking advantage of light which is reflected from the surface within the space.

  • Visible smart metering

    Visible smart metering

    Results of actions can be quickly seen as increased or decreased energy use to encourage responsible energy consumption.

Thorn lights Leeds' tallest office building

Thorn has lit the one of the tallest office buildings outside London. At 32 storeys and 137 metres high, Bridgewater Place is Leeds’ tallest mixed office and residential development, requiring over 3,000 modular luminaires, all of which were specially made

Thorn evolved the lighting in close co-operation with m&e contractor, SES (Shepherd Engineering Services), and building services engineering consultants, Operon. 

Steve Gleghorn, the company’s project manager says: “SES asked for a luminaire that provides an ideal working environment, while offering flexibility, quick installation and optimum energy saving. As a result, we had to carry out an enormous amount of application and customer evaluation work in the Product Verification Facility at Spennymoor.”


The lighting design was determined by the ceiling module of 500mm, and the requirement for an office floor layout that could be quickly and easily adapted from the standard open plan to individual offices. The semi-recessed, custom product Elevation Premier 180 luminaires incorporate unique glowing reflective wing attachments and a centrally mounted louvre (1000 cd/m²), employing twin 36W TC-L lamps to provide high light output with low glare and excellent colour rendering.


To achieve the most efficient use of energy the luminaires employ digital dimmable control gear controlled by daylight sensors and PIR motion detectors. Installation time was reduced via special quick release brackets, reduced packaging to site and tool free electrical connections - the fittings quickly connecting to the Electrack buscom trunking system with modular plug in leads. 


The lighting delivers an upward light component onto the walls and ceiling, thus creating visual interest in the wider space. The result is a stimulating atmosphere while the use of 6500K lamps mimics daylight.  

Designed by architect Aedas, Bridgewater Place combines nine floors of high-spec office space with chic apartments, a hotel, shops and restaurants. The building incorporates a glass atrium that links the two tower structures and allows for maximum daylight.