26 June 2015

Burnley Football Club Premier League Floodlighting Upgrade Turf Moor Stadium

FLOODLIGHTING DESIGN PROPOSAL Overview Burnley Football Club has engaged Musco Lighting Europe Ltd to provide lighting design services as part of the club's planning application for the upgrade of their current metal halide floodlighting system to a new LED lighting system which conforms with the recently increased requirements of the Premier League for high quality television broadcast. In the event that Burnley Football Club are promoted to the Premier League in 2016 or after, the Premier League will require that the club's floodlights conform to the published requirements prior to the first match of their first season in the league. Experience Musco Lighting Europe Ltd., through its parent company, Musco Sports Lighting LLC, has over 35 years of experience in the sports floodlighting industry worldwide. Musco installs 2,500 sports lighting projects annually and is supported by a team of 1,100 employees. Musco has had a presence in the United Kingdom for over 20 years, installing floodlights on a number of sports venues such as The Emirates Stadium (Arsenal FC), Wimbledon Centre Court, The Millennium Stadium, Twickenham Stadium, White Hart Lane, and the Britannia Stadium. In addition, Musco has recently been awarded the contract to install an LED system at AFC Bournemouth for their first Premier League season, a similar stadium design to Burnley FC. Each project involves unique locations that require very specific designs to accommodate the facility users as well as the surrounding residents and road networks. Musco has an extensive team of project engineers who design in accordance with specific codes and guidelines of each individual project location to provide the optimum floodlighting solution. In addition to actual project experience, Musco is consistently on the cutting edge of floodlighting technology in product design and performance. Our LED system cuts operating costs by at least 50%, significantly reduces off-site spill and glare, eliminates all maintenance for 10 years, and guarantees the actual

performance of the system for 10 years – all covered by a comprehensive 10 Year Warranty. Overview of Terms In order to ensure clarity and understanding, some typical floodlighting and project specific terms have been defined/explained to assist in the reading and evaluation of this document and the design documents:

• Horizontal Illuminance - the level of light at a given point measured on a horizontal plane, such as the pitch or a desk. Often used in sports applications as a visual and playability evaluation of light.

• Vertical Illuminance - the level of light at a given point measured on a vertical plane, such as a wall. Vertical illumination is vital for television broadcast, as it defines the amount of light that is seen by the camera(s). As with football, there are often multiple camera positions for television broadcast, which dictates the required locations of the light sources in order to ensure quality broadcast.

• Lux - unit of measure for illumination. For perspective, a sunny day will produce upwards of 150,000 lux, while a gray day will be between around 5,000 lux. A typical streetlight will be between 10-30 lux.

• Luminaire - Often referred to as a floodlight

• Uniformity - Evaluation of how well distributed the light is across a given area. Often expressed as a ratio of minimum point divided by maximum point or minimum point divided by the average of all points.

• Metal Halide - Traditional lamp technology used in sports lighting. Combines specific gases and electricity to produce light.

• LED (Light Emitting Diode) - Light is produced electronically using a semiconductor diode that emits light when conducting current.

Schedule of Reference Documents For the purpose of this design and evaluation the following documents have been used as resources/reference:

• Premier League Floodlighting Requirements - Published 2014

• BS EN 12193:2007 - Sports Lighting

• CIBSE Lighting Guide 4:Sports Lighting

• ILP Guidance Notes on the Reduction of Obtrusive Light Burnley FC Lighting History The existing floodlighting system was installed by Musco Lighting at Turf Moor in 1996. The system was designed to the lighting requirements at the time, which was 1000 lux average, measured on the horizontal plane. There were no vertical requirements for television broadcast at the time. This design was achieved using a combination of lights mounted on the roof of the stadium stands and using two 33 metre high columns. There were a total of 138 x 1500w floodlights installed.

Due to the final positioning and inadequate height of those columns, which were located on either side of the Bob Lord Stand, there was a visible shadow cast across the sideline on the Bob Lord Stand side of the ground. This shadow was attempted to be "washed out" using additional floodlights mounted on the underside of the Bob Lord Stand roof, which was somewhat effective. However, this solution also caused its own problems in that the low mounting height of the Bob Lord Stand resulted in a "hot spot" of light along that sideline, skewing the uniformity of light distribution across the pitch. This existing system has been in operation since installation, with no major upgrade or alteration. The system is currently compliant with the Football Championship division, but would not be compliant for the Premier League. Further, evaluation of the system has shown that it is coming to the end of its life and will need to be replaced in the near future. Premier League Requirements In 2014 the Premier League released a new floodlighting specification to all of its member clubs, which would also apply to any future promoted clubs. This specification was a significant improvement to the previous requirements, with notable changes as follows:

• Changed the measurement of light levels from horizontal to vertical (for television broadcast)

• Required light levels taken to a main camera position and to field level camera positions in each direction (N, S, E, W).

• Set out a 96 grid point measurement plane

• Main camera lux level requirement of 1650 lux average measured vertically toward the camera position. Field level camera lux level requirement of 1000 lux average measured vertically in each direction.

• Increased uniformity requirements for both minimum:average and minimum:maximum uniformities.

• Required specific colour qualities of the light source - increased Colour Rendering Index to a minimum of 80 and increased Colour Temperature to a minimum of 5200k

• Required that the flicker rate of the installation when measured to main camera was not greater than 6% at any given point. Noticable in slow motion camera shot

With the implementation of these lighting requirements, the Premier League assured its partners an extremely high level of quality and uniformity in their television broadcast. Musco Proposed Solution for Burnley FC Musco’s uniquely designed luminaires use a system of reflectors and visors to control and re-direct light onto the pitch, thus significantly reducing the impact

of the floodlights on nearby roadways and residences. Each luminaire is custom designed according to its specific purpose for the pitch lighting. For Turf Moor, Musco has actually proposed to use two different luminaire designs, one which will be mounted on the new masts, and one which will be mounted on the stands. Each luminaire has been specifically design to control the light output and reduced glare to the players, spectators, and surrounding area. Please note the below photos of each luminaire. Proposed mast mounted luminaire:

Proposed roof mounted luminaire:

The design completed by Musco and submitted to the club is fully compliant with the new Premier League requirements. Further, the use of LED technology will offer the club significant advantages in controllability, energy reduction, glare reduction, and light quality for broadcast. The existing masts must be replaced due to their inadequate height and structural capability. New masts have been proposed which will have tilted headframes to better control the light output on a downward plane. The masts will be 44m in height. This height will eliminate the shadow issue on the Bob Lord sideline. Please note the diagrams below:

Design Evaluation - Spill Light Levels As part of the design requirements, Musco has produced light spill calculations on a blanket grid to a radius of 200m around the stadium. The light spill calculations are given on both the horizontal and vertical plane. As noted previously in this report, horizontal readings are measured on a horizontal plane such as the ground, a pitch, a sidewalk, etc... Vertical readings would be measured back towards the light source and would be given typically for the facade of a building. As a general rule of thumb and for reference with this report, the following lux levels would be typical:

• Moonlight: 1-2 lux

• Street or sidewalk lighting: 10 - 25 lux

• Security or outside working light: 50 lux

• Recreational sports lighting: 100 - 200 lux

• Television broadcast lighting: 1,500 - 3,000 lux

• Sunny Day: 50,000 lux In addition to providing the spill light levels to the proposed new floodlight installation, Musco has provided indicative spill light levels of the existing floodlight installation. The below chart gives the average horizontal and vertical lux level readings of the existing and the proposed design:

Data Existing Installation Proposed Installation Average Horizontal Lux - 200m 1.29 lux 2.55 lux Average Vertical Lux - 200m 4.81 lux 11.56 lux While the average spill level readings do increase with the new installation, a few items should be noted:

• The Premier League requirements have increased not only in the amount of light required, but in the way the system must be designed for television broadcast. The floodlights are currently aimed quadrantly to the pitch, whereas the new installation must be aimed fully across the pitch in all directions in order to comply with the specification. This will result in additional spill levels, and cannot be avoided.

• The readings along Harry Potts Way to the south of the stadium have actually decreased quite significantly in many places with the proposed new floodlights, which can be attributed to the much better control of the LED system.

• The levels to the north of the stadium behind the main stand have increased, which can be attributed to the increase in the height of the columns - again this cannot be avoided to comply with the Premier League requirements.

• The LED system allows for dimming capability that the existing system does not provide. Thus, the light levels could be reduced as much as

75% following the match to allow for safe egress, but would significantly reduce the spill light impact to the surrounding area.

• While the spill levels do increase in some casystem will be reduced thanks to the advancements in the design of the floodlights - this has been noted in the above photos of the luminaires. See below photos of Musco glare control compared to alternative floodlights.

75% following the match to allow for safe egress, but would significantly reduce the spill light impact to the surrounding area.

While the spill levels do increase in some cases, the glare of the new system will be reduced thanks to the advancements in the design of

this has been noted in the above photos of the luminaires. See below photos of Musco glare control compared to alternative floodlights.

significantly reduce the spill light impact to the surrounding area.

ses, the glare of the new system will be reduced thanks to the advancements in the design of

this has been noted in the above photos of the luminaires. See below photos of Musco glare control compared to

Conclusion The changes to the Premier League requirements for lighting makes it an absolute necessity for the lighting at Turf Moor to be upgraded, and significantly so. The proposed design achieves the requirements of the Premier League and does so with only minor impact on the surrounding area compared to the existing installation. The club has chosen to be progressive in proposing an LED solution. It is certain that if the club had chosen to propose a metal halide system similar to their existing system, the resulting impact on the surrounding area would be much greater. The ability for the club to have greater control over the floodlights, including dimming capability, is a significant advantage which will minimise the impact on the surrounding area.