Aberystwyth Town Football Club - Ceredigion -100 Floodlighti… · Aberystwyth Town Football Club Floodlighting Analysis Report 11 February 2015 Waterman Building Services Limited

Aberystwyth Town Football Club

Floodlighting Analysis Report

11 February 2015

Waterman Building Services Limited

South Central, Peter Street, Manchester M2 5QR



Client Name: Aberystwyth Town Football Club

Document Reference: 29.1

Project Number: BSD40000-100

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Property & Buildings Transport & Infrastructure Energy & Utilities Environment

Quality Assurance – Approval Status

This document has been prepared and checked in accordance with Waterman Group’s IMS (BS EN ISO 9001: 2009 and BS EN ISO 14001: 2004)

Issue Date Prepared by Checked by Approved by

0 11-02-2015 C. Lumor T. Davies T. Davies

A 11-02-2015 C. Lumor T. Davies T. Davies

B 12-02-2015 C. Lumor T. Davies T. Davies

C 13-02-2015 C. Lumor T. Davies T. Davies

Comments

0

For Comment

A Executive Summary Tables Updated

B Introduction, Result Table 2 and Conclusion Updated

C Final Report



Disclaimer

This report has been prepared by Waterman Building Services, with all reasonable skill, care and diligence within the terms of the Contract with the client, incorporation of our General Terms and Condition of Business and taking account of the resources devoted to us by the agreement with the client.

We disclaim any responsibility to the client and others of any matters outside the scope above.

This report is confidential to the client and we accept no responsibility of whatsoever nature to third parties to whom this report, or any part thereof, is made known. Any such party relies on the report at its own risk.


C:\Users\MRCL\Desktop\New folder\40000 -100 Floodlighting Analysis Rev C.docx

Content

1. Executive Summary ................................................................................................................... 1

2. Introduction ................................................................................................................................. 3

3. Modelling Input Data .................................................................................................................. 4

4. Results ......................................................................................................................................... 5

5. Conclusion .................................................................................................................................. 6

6. Recommendations ..................................................................................................................... 7

7. Abbreviations .............................................................................................................................. 8

Appendices

A. Floodlighting Design Analysis Output – At 500 Lux

B. Floodlighting Design Analysis Output – 100 Lux

C. Proposed Luminaire Datasheet

D. Full Summary of Report on A1 Sheet


1 C:\Users\MRCL\Desktop\New folder\40000 -100 Floodlighting Analysis Rev C.docx

1. Executive Summary

Waterman Building Services (WBS) has been appointed by Tai Ceredigion, to provide a floodlighting

assessment in support of planning application for the use of the football pitch and for the impact on

the proposed residential development.

The original design carried out by the Football Club’s floodlighting specialist could not address the

potential of light intrusion (into windows) to be experienced by the residents of the proposed

residential flats hence the appointment of WBS to carry out floodlighting design to minimise the

spilling of light beyond the football field and also to offer improved the energy efficiency.

The current design proposals reflect comments exchanged between Ainsley Gommon Architects and

Waterman Building Services (WBS) over the past few weeks. The target modelled lighting levels for

the pitch are 500lux for exceptional use for matches in Winter seasons and reduced 100 lux level for

training and other outdoor events.

The design carried out by Waterman Building Services were modelled using the existing high

columns positions and good LED light source output of 1700W (at 100%) and dims down to 200W

(at 10%) was used. The luminaire proposed is specifically designed to minimise the upward spread

of light near to and above the horizontal and correctly aimed to minimised obtrusive light into the

flats.

The results of the floodlighting calculation are summarised in the table below and the full results in

Section 4 and Appendix A.

1.0 Scenario 1: Results at 500l ux

Area Ave

Max Min Min/Avg Min/Max

Pitch 505 839 400 0.70 0.48

Flat Side_24 99.94 170 44 0.44 0.26

Flat Side_30 55.86 100 22 0.39 0.22

Flat Side_38 27.21 62 9 0.33 0.15

Flat Side_44 52.27 91 26 0.49 0.29



2.0 Scenario 2: Results at 100 lux

Area Ave


Pitch 112 168 80 0.7 0.48

Flat Side_24 19.99 34 9 0.45 0.26

Flat Side_30 11.17 20 4 0.36 0.20

Flat Side_38 5.40 12 2 0.37 0.17

Flat Side_44 10.45 18 5 0.48 0.28

The results in the tables above shows the pitch lux values with their corresponding values on the

flats. Some of these values on the flats at 500 lux are higher than the recommended ILP values of

25 lux for pre-curfew and 5 lux for post curfew for an urban classification.

However, at the 100 lux setting the majority of the lighting levels on the flats is within the ILP guidance

values, albeit some areas are still higher which are not covered by windows.



2. Introduction

This report has been produced at the request of Tai Ceredigion in support of the planning application

for the proposed residential development and also to alleviate concerns raised by the planning

authority of potential for nuisance from floodlighting at the football ground to the proposed residential

units.

The floodlighting assessment carried out by the Football Club’s Specialist in 2009 reveals that the

required illumination on the pitch do not meet UEFA/FAW standard. There were concerns raised in

the report of lack of flexibility in the operation of the floodlights and the high cost of running the highly

inefficient metal halide lamps.

It is understood that a total of 20 home games per year, with 10 under floodlights are played, mainly

in winter seasons under UEFA/FAW guidelines. Also, the total use of floodlighting for First Team

games will not exceed 30 hours per year, which equates to approximately 10 matches of 3 hours

duration under floodlighting.

This floodlighting analysis aims to assess the impact of using the floodlights under UEFA illumination

level of 500lux on the proposed residential development and also for reduced lighting levels at 100lux

on training and other outdoor events.

The proposed wide beam luminaire and the high output LED lamp source are selected to address

the light spillage problems and improve energy efficiency. This luminaire offers easy replacement as

no complicated bracketry is required and the existing electrical cabling can be used.



3. Modelling Input Data

The calculation comprises 4 x 1700W LED lamps mounted on the 4No. 16m columns and 13 x 1700W LED lamps mounted on the 2No. 18m columns. These columns were modelled to reflect the exact positions onsite.

All the luminaires were aimed at the correct angle to achieve the 500 lux levels in order to meet the UEFA requirement and also to achieve a uniformity of 0.7.

In order to achieve the required 100 lux illumination level the designed floodlights at 500 lux were dimmed down.



4. Results

Results at 500 Lux

The vertical illuminance light spills on the flats recorded at full switched at 500 lux shows readings

varying from 0 lux to 135 lux (max).

The tabulated results below indicate that the design at 500 lux will have a significant light spillage on

the proposed block of flats.

The full recorded readings are in Appendix A and D.

Area Ave


Pitch 505 839 400 0.70 0.48

Flat Side_20 98.71 164 43 0.44 0.26

Flat Side_22 72.21 154 23 0.32 0.15

Flat Side_24 99.94 170 44 0.44 0.26

Flat Side_26 74.71 150 25 0.33 0.17

Flat Side_28 92.57 161 40 0.43 0.25

Flat Side_30 55.86 100 22 0.39 0.22

Flat Side_32 84.14 145 36 0.43 0.25

Flat Side_34 58.29 115 21 0.36 0.18

Flat Side_36 65.86 116 29 0.44 0.25

Flat Side_38 27.21 62 9 0.33 0.15

Flat Side_42 64.66 112 30 0.46 0.27

Flat Side_44 52.27 91 26 0.49 0.29

Results at 100 Lux Switched Down

The results at 100 lux (ave) show reduced light spillage on the proposed block of flats. These values

range from 0 lux to 19 lux (max).

The full recorded readings are in Appendix B and Appendix D



5. Conclusion

The design at 500 Lux average with 0.71 uniformity ratio shows a vertical overspill on the flats as

high as 170 lux (Max) and as low as 9 lux (Min). These values are higher than the ILP allowance of

25 Lux for pre-curfew and 5lux for post-curfew.

However, with the 500 lux switch-down to 100 lux, we are at 80 percent reduction of power (for 100

lux switch down). The maximum vertical readings recorded 0 lux to 19 lux thereby falling within the

recommended ILP requirement of 25 lux.

The values at 500lux might be acceptable if the EHO relaxes the requirement from the ILP Guidance.



6. Recommendations

Undertake the following in relation to the design:

1. Check and confirm if the existing 18m columns can carry the 13 x AAA Lux luminaires and 16m columns can carry the 4 x AAA Lux proposed luminaires.



7. Abbreviations

Ave Average

FAW Football Association of Wales

FLA Floodlighting Analysis

ILP Institution of Lighting Professionals

LED Light Emitting Diode

Lux Unit of light measurement

Max Maximum

Min Minimum

Ave Average

UEFA Union of European Football Association

WBS Waterman Building Services



APPENDICES

A Floodlighting Design Analysis Output – Results on Pitch and Flats at 500 Lux

B Floodlighting Design Analysis Output – Results on Pitch and Flats at 100 Lux

C Proposed Luminaire Datasheet

D Full Summary of Design Output on A1 Sheet.



A. Floodlighting Design Analysis Output – At 500 Lux



B. Floodlighting Design Analysis Output – At 100 lux





C. Proposed Luminaire Datasheet



D. Full Summary of Design on A1 Sheet





Aberystwyth Town Football Club - Ceredigion -100 Floodlighti… · Aberystwyth Town Football Club Floodlighting Analysis Report 11 February 2015 Waterman Building Services Limited

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