Replacement Part List

Application Guide
The GTL Series recessed LED troffer’s economical, solid-state lighting is ideal for new
construction, renovation and retrofit opportunities. It is ideal for the broad range of
applications where general-purpose fluorescent lighting currently prevails.
GTL SERIES
COMMERCIAL INDOOR | One Lithonia Way | Conyers, GA 30012 | Phone: [phone] | www.lithonia.com/indoor
©2013 Acuity Brands Lighting, Inc. All rights reserved. GF_12-7419-Config-AppGuide
9' ceiling: 80/50/20 reflectances; 2.5’ work plane
LLF for LED: 0.85
LLF for Fluorescent: 2-lamp / 0.77; 3-lamp / 0.74; 4-lamp / 0.75
Spacing Luminaire Wattage Average FC Power Density
8' x 8'
2GTL 40L 43 48 0.59 W/ft²
2GTL 48L 51 58 0.69 W/ft²
2GTL 60L 59 66 0.8 W/ft²
2GTL 72L 77 84 1.05 W/ft²
LED
Spacing Luminaire Wattage Average FC Power Density
8' x 10'
2GTL 40L 43 41 0.5 W/ft²
2GTL 48L 51 50 0.6 W/ft²
2GTL 60L 59 57 0.69 W/ft²
2GTL 72L 77 72 0.9 W/ft²
LED
Spacing Luminaire Wattage Average FC Power Density
8' x 8'
2GT8 2 32 A12 120 ADDE 58 50 0.79 W/ft²
2GT8 3 32 A12 1/3 ADDE 88 71 1.2 W/ft²
2GT8 4 32 A12 1/4 ADDE 112 95 1.52 W/ft²
Fluorescent
Spacing Luminaire Wattage Average FC Power Density
8' x 10'
2GT8 2 32 A12 120 ADDE 58 43 0.68 W/ft²
2GT8 3 32 A12 1/3 ADDE 88 61 1.03 W/ft²
2GT8 4 32 A12 1/4 ADDE 112 81 1.31 W/ft²
Fluorescent
66
8
9
60
60
2.5
8
VISUAL
6
5
8
9
60
60
2.5
10
VISUAL
Fluorescent Wattage LED Wattage % of Savings
2 Lamp T8 58W 2GTL 4 40L 43W
26%
2 Lamp T8 58W 2GTL 4 48L 51W
12%
3 Lamp T8 88W 2GTL 4 60L 59W
33%
4 Lamp T8 112W 2GTL 4 72L 77W
31%
SUGGESTED REPLACEMENT