12-03-18 1936 E. Katella Ave. Digital Billboard Photometric Analysis
330 N. Brand Blvd. Suite 950
Glendale, CA 91203
818.539.1111 • www.exp.com
City of Orange,
1936 E. Katella Ave.
Digital Billboards
Photometric Analysis
Project Number
2018081.00
Prepared By:
Michael Schrupp
Date Submitted
12 November, 2018
City of Orange, 1936 E. Katella Ave.
Digital Billboards Photometric Analysis
exp Project No. 2018081.00
12 November, 2018
ii
TABLE OF CONTENTS
1.0 NARRATIVE .................................................................................................................................... 1
2.0 APPENDIX - FOOT-CANDLE LEVEL GRAPHIC SHEETS ........................................................... 3
City of Orange, 1936 E. Katella Ave.
Digital Billboards Photometric Analysis
exp Project No. 2018081.00
12 November, 2018
Page 1
1.0 NARRATIVE
We (exp engineering) have conducted a photometric review of the digital billboard being proposed at
1936 E. Katella Ave, Orange, CA..
Using the photometric software AGI32, we studied the screen’s output brightness to determine the
following:
A) Potential modifications to the sign that may be needed to comply with the OAAA (Outdoor
Advertising Association of America) Lighting Level Guideline, and
B) The impact the sign will have at night on the surrounding community.
The proposed billboard is to be 14’x48’ with the top of the sign mounted at +89’ above the ground
with maximum screen brightness of 300 NITS (300 Candela per Square Meter) in the evening.
Per OAAA guidelines, the proposed sign, displaying a full white image (for maximum brightness)
should not exceed .3 foot candles over the surrounding ambient light levels at a distance of 250’ in
any direction.
The photometry used in this study is based on the specified Nichia series 336 LED modules, which
output light horizontally at 90° and 45° vertically, at the evening output level of 300 Candela per
Square Meter.
As we are unable to determine what the ambient light levels will be at the location, the studies were
done assuming the worst-case scenario of no ambient light.
We have included graphical illustrations demonstrating the light levels in foot-candles we expect from
the screen.
SHEET 1 of the attachment is a location plan at the 1936 E. Katella Ave. site, indicating the 250’
boundary overlaid on a map of the proposed site, as well as the projected relative angle of light
emanating from the sign.
SHEET 2 shows the overall light levels at the ground, freeway, and adjacent buildings over the entire
Langton area.
SHEET 3 is a graphic representation of the light levels impacting the adjacent residential buildings
around the Langton site.
City of Orange, 1936 E. Katella Ave.
Digital Billboards Photometric Analysis
exp Project No. 2018081.00
12 November, 2018
Page 2
Conclusions
We see no light levels in excess of .3fc beyond the 250’ radius of the signs, nor do we find any
significant impact to the neighboring property provided the sign brightness is reduced after dark to the
300 NIT level.
This report, prepared by exp Services Inc., is intended for the exclusive use of the City of Orange,
and Outfront Media. Neither exp Services Inc., the City of Orange nor Outfront Media assume any
liability for the use of this report, or for the use of any information disclosed in the report, or for
damages resulting from the use of this report, by other parties.
City of Orange, 1936 E. Katella Ave.
Digital Billboards Photometric Analysis
exp Project No. 2018081.00
12 November, 2018
Page 3
Appendix
Foot-candle Level Graphic Sheets
1936 KATELLA Ave.
Release:
11/12/2018
1 of 3
OUTFRONT MEDIA LLC
ORANGE, CA BILLBOARDS
330 N. Brand Blvd. Suite 950
Glendale, CA 91203
250’ Boundary
1936 KATELLA Ave.
Release:
11/12/2018
2 of 3
OUTFRONT MEDIA LLC
ORANGE, CA BILLBOARDS
330 N. Brand Blvd. Suite 950
Glendale, CA 91203
Overall Photometry Layout
1936 KATELLA Ave.
Release:
11/12/2018
3 of 3
OUTFRONT MEDIA LLC
ORANGE, CA BILLBOARDS
330 N. Brand Blvd. Suite 950
Glendale, CA 91203
Adjacent Buildings