LED upgrade slashes energy usage and carbon footprint by 71% for BizSpace’s refurbished Wimbledon business centre


BizSpace is a national provider of managed workspaces, hiring out everything from offices to industrial units and is dedicated to becoming “champions of Britain’s micro and small businesses; and builders of lively, friendly working communities”. Fuelled by this single-minded passion and energy, the company has since grown exponentially. “BizSpaces” are now everywhere, and come in every shape and size”, catering for a total of 4011 businesses in 98 locations across the UK.

BizSpace’s mission, in essence, is to help today’s SME’s do their jobs better by providing the right work environment, with the right equipment and facilities and most importantly, at the right price. Sustainability and flexibility are therefore at the core of company’s promise to “keep bills down and energy up”, and a carefully planned lighting strategy can tilt the scales of profitability for both BizSpace and its growing clientele.

As part of a broader refurbishment programme launched in early 2017, Dextra Lighting were called in to upgrade the lighting for BizSpace’s South Wimbledon premises. The initial proposal featured a wide range of ECA compliant, precision-engineered LED products and intelligent controls, offering a cut in energy usage of 71% compared to the previous installation, which is equivalent to an annual financial saving of approximately £11,000 and a total reduction of 56,808 kg in carbon emissions. The overall return on investment was further improved by taking measures to reduce installation costs and minimise maintenance by using high-quality LED luminaires.

Upon reviewing the potential of upgrading to a sensor-controlled LED system, Matthew Barrell, Regional Operations Manager at BizSpace, noted that: “never before had we considered the true value and benefits of intelligent lighting design and how this may support our business model” and that Dextra Lighting’s “lighting proposition would influence the wider extensive refurbishment programme, which has ensured the ongoing success of our lighting strategy”.

“never before had we considered the true value and benefits of intelligent lighting design and how this may support our business model”

With legislative pressure on small and large businesses to reduce their carbon footprint, switching to LED will improve the green credentials of both BizSpace and its clients, making them more attractive to business partners, investors and customers. Lower carbon emissions will also boost the company’s performance on the government’s Carbon Reduction Commitment league table for added tax benefits. All these factors will allow BizSpace and the SMEs hiring out their facilities, to be both financially sound and environmentally responsible in their operations.

Total Service – Design to Disposal
Dextra Lighting were involved at all stages of the relighting project from the initial site survey, payback calculations, design and delivery, right through to helping facilitate  installation and carrying out commissioning. All end of life fittings were quickly and efficiently disposed of and recycled in adherence to WEEE regulations by Dextra Group’s dedicated award-winning subsidiary, Dexreco. With its vast manufacturing capabilities, a dedicated transport fleet, a registered Approved Authorised Treatment Facility (AATF), experienced in-house designers, specification team and technicians, Dextra Group were able to cater for all of BizSpace’s lighting needs in a fast, efficient and sustainable way with minimal disruptions to their business schedules.


Dextra Lighting’s challenge was to design a fully compliant lighting solution balancing energy-efficiency and optimal illumination with aesthetic appeal. A combination of newly designed systems and replacement fittings were to be installed across the business centre’s 92 units which include offices, workshops, communal spaces, storage areas and amenities, with the aim to improve customer experience whilst keeping overheads and emissions low. The new lighting was to abide to CIBSE guidelines and British Standard regulations to offer the correct lux and uniformity levels in all locations and meet the building’s safety requirements.

Operational Efficiency

BizSpaces offer 24 hour access, 7 days a week to allow businesses to work at their own pace and schedules. Reductions in energy consumption therefore, would have a notable impact on the financial and environmental sustainability of the premises, especially with energy prices constantly on the rise. With this in mind, Dextra Lighting made use of its extensive range of LED luminaries and intelligent control solutions to not only drastically cut the lighting’s electrical consumption but to adapt to the varying occupancy patterns of workers using the facilities using smart control features. Savings would be made by lowering both the total power load and operating hours throughout the day.

Value for Money

The majority of products selected for the project are featured in the government’s Energy Technology List, offering eligibility to the Enhanced Capital Allowance scheme for 100% tax relief for the first year of purchase, saving BizSpace a considerable capital sum upon purchase.

Installation was to be kept to a minimum by replacing the existing fluorescent (T8 and T5), halogen and SON fittings on a one-to-one basis in areas where modifying the infrastructure would prove time-consuming and costly. As the majority of Dextra Lighting’s products are manufactured with the latest LM80-verified Lumileds 3535 LED sources offering 90% lumen maintenance over the first 60,000 hours of operation, the new installation will require minimal maintenance throughout its lifetime, making it more sustainable to run and avoid disruptions to customers’ use of the premises.


In addition to automated sensor functions, the luminaires would also feature user-friendly dimming controls to offer customers added flexibility to adjust the lighting to their unique requirements.


Graduate LED Recessed – Offices & Meeting Rooms

Lighting plays a crucial role in creating comfortable and productive working environments. At BizSpace, focusing on aesthetics as well as efficiency was imperative, as this would make the offices more enjoyable to work in and attract potential customers with each viewing.

Achieving the CIBSE recommended light level of 500lux was only the first step in providing the best lighting conditions possible for offices. That is why a BSEN12464 compliant, 5772llm version of the Graduate LED Recessed was supplied from a range of outputs of 2861llm to 7132llm. This output package adheres to the prescribed 3000 candela glare limit and Unified Glare Rating (UGR) 19 while still delivering a high output. The result: brightness, uniformity and visual clarity without producing uncomfortable glare, making it ideal for offices using computers and other VDUs on a regular basis. By combining the latest Lumileds LED sources with a highly efficient prismatic opal extruded diffuser and aluminium white gull-wing reflectors, the Graduate Recessed LED delivers superb light quality at the desired lux levels at an impressive efficiency of 113 luminaire lumens per circuit watt.

Approximately two hundred, 1200 x 600mm luminaries were installed in the offices and meeting rooms, replacing the existing 4 x 36W T8 fluorescent fittings. The one-to-one replacement of the previous fixtures reduced the total electrical load from 36,138w to 9,008w (i.e. from 181.6w down to 50.3w per luminaire), with vastly improved light quality and illumination levels.

The refit was performed quickly and easily as luminaires were provided in lay-in format to facilitate installation into the existing ceiling grid system and the existing connection points were used in their original locations without any additional wiring or modification, saving BizSpace any further expenses.

The Graduate LED range offers compatibility to all mainstream dimming functions and now includes White Tuneable option allowing users to change the colour temperature of the LED source as desired. For the offices, luminaires were supplied with DALI dimming drivers and were networked to standalone Reacta 7 sensors to allow staff to adjust the lighting as required and respond to occupancy patterns and daylight levels throughout the day to optimise lux levels and maximise energy savings.

Dual LED – Circulation Areas / Meeting Rooms

Customised with various output packages and luminaire sizes, the Dual LED recessed luminaire reinvigorated the corridors and meeting rooms with an improved light quality and attractive contemporary design. Its twin high-transmission opal diffusers exploit the full potential of its 3535 HE (high-efficiency) Lumileds LED chip board, producing a bright, yet controlled light with a wide and uniform distribution. The combination of highly efficient optic design and premium LED sources offers vast improvements in light quality at an efficiency of 118 luminaire lumens per circuit watt, using half the power of the previous T5 fluorescent lighting. 2772llm and 5552llm versions of the Dual LED replaced the existing fifty-five T5 panel lights on a one-to-one basis, reducing energy consumption from a total of 3,143w in all the selected areas, down to a staggering 1,564w. To add to these energy savings the luminaire was installed with a DSI dimmable driver and an integral Reacta 44 sensor offering both presence detection and daylight regulation, allowing for additional energy savings of up to 30% depending on the application and location in which it operates.

Lay-in versions of the luminaires were supplied in both 600 x 600mm and 1200 x 600mm sizes to offer full compatibility to the existing ceiling system. Installation was made simpler and quicker thanks to its lightweight and slim line construction, making luminaires easier to handle and position into the ceiling grid systems and no major rewiring or structural modifications were required.