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T12: 12/8"T12: 12/8"

T8: 8/8"T8: 8/8"

T5: 5/8"T5: 5/8"

The Shrinking Fluorescent

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Lamp PhysicsT5 Smaller diameter lamp has less surface area than T8.

T5....2*pi*r*h = 2 * 3.14 * .313" * 44.25 = 87 sq in

Dissipate 238 watts in 4 lamps.

T8....2*pi*r*h = 2 * 3.14 * .50" * 46.25 = 145 sq in

Dissipates 225 watts in 6 lamps, therefore operates cooler.

T8T8

T5T5

T8 is 8/8ths or 1 inch wideT8 is 8/8ths or 1 inch wide

T5 is 5/8 inches wideT5 is 5/8 inches wide 2” shorter

MJS

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Lumen vs Temperature

20

40

60

80

100

120

0 10 20 30 40 50

Temperature (°C)

Rela

tive L

um

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s (

%)

T8

T5

Optimal Lamp Performance

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T8 FixtureT8 Fixture T5 FixtureT5 Fixture

T5 vs. T8 Luminaires

Reduced Material Costs — Superior Optical ControlReduced Material Costs — Superior Optical Control

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T5 Applications — General

• Indirect Suspended Fixtures

• Direct/Indirect Lay-in Fixtures

• Smaller Design Alternative to 2’ x 4’ Parabolic Direct Fixtures:3” or 6” Wide by 2’, 3’, 4’ or 5’ Long

• Retrofit Kit for Existing 2’ x 4’ Parabolic

• High bay lighting - replacing HID.

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_Lamp Efficacy vs. Diameter

T5T5 2828 29002900 104104

T8SPXT8SPX 3232 30503050 9595

T5/HOT5/HO 5454 50005000 9393

T8SPT8SP 3232 28502850 8989

CW/WMCW/WM 3434 26502650 7878

CWCW 4040 30503050 6666

DiameterDiameter Lumens/WattLumens/WattWattsWatts LumensLumens

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Previous

T8 lamps are available in a wide variety of color temperatures: warm (3000K) to cool (4100K) to very cool (5000K and 6500K). Listed below or some useful upgrade options.

F32T8SP F32T8SPX F32T8/WM F32T8/WM/XLF32T8/SXLF28T8/UMXF32T8/HL/XL

F32T8/CVG

Standard Specification Series5% higher lumens and improved CRI (color rendering)2 watt savings per lamp2 watt savings plus 25% longer lifeStandard wattage but 50% longer life4 watt saving per lamp (suggest UltraMax ballasts)10% higher lumens and 50% longer life

CovRGuard shatter protection

Also consider GE's UltraMax ballast for maximum energy savings or GE's UltraStart ballasts for extended life even with motion sensors and frequent switching

These are some ideas. Please make independent check for suitability of suggested upgrades. See Disclaimer.

Standard More Light, higher CRI Less Energy Longer life, less energyLongest lifeLeast EnergyMore Light, longer lifehigher CRISafety

Back to Top

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GE now offers a 25W 4’ T8 lamp for customers who need to create the lowest wattage system with 4’ T8 lamps. The 25W lamp provides lower system lumen output than other 4’ T8 lamps, but this is an acceptable compromise for applications where lumen output is not critical or where energy savings is more important.

What Is It?

Product Features:• Reduce energy costs over 43% vs T12• Reduce energy costs over 18% vs T8• TCLP compliant• 25 Watts• 2400 initial lumens• Rated Life:

- 36,000 hrs / 40,000 hrs IS 3hr / 12hr- 40,000 hrs / 46,000 hrs PRS 3hr / 12hr

F32T8 / 25 Watt Lamps 25 Watt 4’ T8

LOW WATTAGE SYSTEMSLOW WATTAGE SYSTEMS

PC Description72128 F32T8/25W/SPX30/ECO72129 F32T8/25W/SPX35/ECO72130 F32T8/25W/SPX41/ECO72131 F32T8/25W/SPX50/ECO

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• F32T8/WM/XL

• 30

• 2800

• 2625

• 93

• 83

• 24000

• 29000

1. Key Messages and Benefit Comparisons

a. F28 vs. F25 WShows the lamp that provides the highest lumens per watt without significant lumen sacrifice…

• Description

• Watts

• Initial Lumens

• Mean Lumens (Design)

• Lumens Per Watt (LPW)

• CRI

• Life @ 3hrs/start

• Life @ 12hrs/start

• GE

• F32T8/25W

• 25

• 2400

• 2280

• 96

• 85

• 20000

• 25000

• F28T8

• 28

• 2750

• 2585

• 98

• 85

• 18000

• 24000

• F34SP35/WM

• 34

• 2750

• 2475

• 81

• 72

• 20000

• F32T8/SP

• 32

• 2800

• 2660

• 88

• 78

• 20000

• 24000

GEGEGEGE

…the GE F28T8

*Specifications from online catalogs 4/2005

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• F34SP35/WM

• 34

• 2750

• 2475

• 72

• 20000

1. Key Messages and Benefit Comparisons

a. F28 vs. F25

Initial Lumens: -13% vs. GE F28T8 -14% vs.

F32T8 & WM -19% vs. F32T8/SPX

Life@12 hrs/start: -14% vs. GE XL (SP/SPX, WM, HL) -31% vs. F32T8/SXL

Initial Lumen Comparison

2200

2300

2400

2500

2600

2700

2800

2900

34w T12 32w T8 30w XLT8

28w T8 25w T8

13% Less Light

*Based on published nominal initial lamp lumen data

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_Lamp Rated Initial Lumens Mean Lumens (%) Life (hr.) Ballast Factor C U

System 1: 3 F32T8 2800 95% 20,000 0.88 1System 2: 2 28WT5 2700 95% 30,000 1 1System 3: 3 F28T8 2750 95% 30,000 0.88 1System 4: 2 54WT5 HO 5000 95% 30,000 0.88 1

3 F32T82 28WT53 F28T82 54WT5 HO

0 1000 2000 3000 4000 5000 6000System1 0 0.05 0.1 0.15 0.2 0.25 0.3Lmp1 hr 0 1000 2000 3000 4000 5000 6000Lmp1% Lum 1 0.992630534 0.98561761 0.978960803 0.972659692 0.966713857 0.961122883Lmp1 Lum 7392 7337.524906 7285.685372 7236.478257 7189.900442 7145.948829 7104.620348

System2 0 0.05 0.1 0.15 0.2 0.25 0.3Lmp2 hr 0 1500 3000 4500 6000 7500 9000

Note: Mouseover the cells w ith red triangle in upper right corner for additional information.To remove a system, type zero in the number of lamps cell

# lamps /f ixture

Lighting System Lumen Comparison Tool

System Lumen Maintenance Comparison

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

0 5000 10000 15000 20000 Hours

Average Lumens on work plane from each

fixture

3 F32T82 28WT53 F28T82 54WT5 HO

Simulated curves are show n here approximating published ratings.

(Plotted only to 20,000 hours)

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T8 vs. T5 Ceiling Uniformity Comparisons

Fixture Spacing

Initial Foot-candles

Maintained Foot-candles

Ceiling Uniformity

10' 93 60 5.2:1

12' 70 53 4.6:1

15' 56 42 7.5:1

T8

T5

T5*Note: IES recommends a max 8:1 ratio to meet RP1*Note: Numbers based on T5 fixture: LDM1-1 and T8 fixture LSX-020941.

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T8 vs. T5 Ceiling Spacing Comparison

T8 FIXTURES 10’ O.C.

216 LINEAR FEET

1.32 W/FT2

T5 HO FIXTURES 15’ O.C.

144 LINEAR FEET

0.89 W/FT2

Note: This comparison was made based on the performance of the fixtures listed above.

LSX-020941 LDM1-1

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_Lamp Type F32T8 F28T8 F54T5 HOLamp Life, assume Occ sensors 12 Hrs./Start 20000 24000 30000Number of Lamps 12 12 8Lumens 2800 2750 5000Lumen Maintenance @ 40% of life 95% 95% 95%Ballast Factor 0.88 0.88 1Light Output 28090 27588 38000Lumen Maintenance @ 70% of life 95% 95% 95%Light Output at 70% of Life 28090 27588 38000Price per Lamp 2.00$ 3.00$ 8.00$ Disposal Cost per Lamp -$ -$ -$ Total Lamp Price 24.00$ 36.00$ 64.00$ Fixture Cost 100.00$ 100.00$ 150.00$ Retro Labor Cost -$ -$ -$ Rebate per Fixture -$ -$ -$ Retrofit Price 124.00$ 136.00$ 214.00$ System Wattage 96 72 108Annual Operating Hours 8000 8000 8000Labor $ Per Lamp, Relamp Only 25.00$ 25.00$ 25.00$ Average Electric Rate 0.080$ 0.080$ 0.080$ Total Number of Fixtures 1 1 1Cost to Retrofit, One time cost: 124.00$ 136.00$ 214.00$ Incremental Cost over existing system: -$ -$ -$ Lamps 9.60$ 12.00$ 17.07$ LaborElectricity 61.44$ 46.08$ 69.12$ HVAC Savings HVAC CoefficientTotal 71.04$ 58.08$ 86.19$ A

nnua

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_UltraStartTM Ballast for T5 and T8 Fluorescent Lamps

Overview

What is it• Programmed Start electronic ballasts - PS• Extends lamp life in frequently switched

applications• Ideal for occupancy sensors and daylight

harvesting• Maintains lamp warranty

Who is the Target Audience• Retail• Industrial• Warehouse• Commercial

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_Maintain lamp life when customers are using automatic light controls• NEMA recommends PS in applications of 5 or more starts per day.•This was based on a 2004 recommendation acknowledging that Program Start ballast were not energy efficient and were series wired and slow start.

Frequent Switching Effect

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Warranty for lamps on GE Electronic Ballast

UltraStart System with GE T5 or T8 lamp on a burning cycle of 15 minutes or more per start.

Occupancy Sensors equal GE UltraStart!

GE UltraMax or ProLine Instant-Start System on a burning cycle of 10 hours or more per start

10:00

00:15

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_UltraStartTM Ballast for T5 and T8 Fluorescent LampsOverview

Why?• Maintain lamp life when customers are using automatic light controls

• NEMA recommends PS in applications of 5 or more starts per day

• UltraStart is highly energy efficient and has the convenience of parallel start

• Customers are more satisfied when lamp life is not compromised

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_T12 CW on Electromagnetic Ballast

Energy Savings with about the same mean lumen levels

F28T8/UMX lamp on.77 BF UltraMAX~ 42% energy savings!

Maximum savings: the most efficient retrofit system available today for replacing T12 systems without significant loss in light levels; GE's UltraMAXballast is a feature-laden electronic ballast, the best value for its price! pg. 4-9

Energy Savings, same ballast

F28T8 UMXF32T8/WM or F32T8/WM/XL

F32/WM/XL gives you BOTH energy savings and longer life! You can get more savings with F28 but may run into striations in lamp, expecially if temperatures fall to 60F or below. pg. 4-9

Longer Life, same ballast

XL and SXL lampsXL have 25% longer life, SXL has 50% longer life; also consider F32T8//WM/XL. pg. 4-8 - 4-9.

More Light, same ballast

HL (High Lumen) lampsSPX lamps`

HL lamps give 11% more light than SPSPX lamps give 5% more light than SP. pg. 4-9

Better color, same ballast

SPX lamps CRI improves from 78 to 86, also get 5% more light. pg. 4-9.

T5, T8 and T12 Shatter protection CovRguardExcellent shatter protection, unique product, superior to competing schemes (tubes, etc.) pg. 4-19 - 4-22

New InstallationsReduced fixture count

HL (High Lumen Lamps) on high BF UltraMAXballasts

Reduce fixture count with fewer lamps to maintain; this is the highest efficacy Fluorescent System available today (including F28) pg. 4-9.

Old or New Installations

Design Improvement T5Elegant fixtures, indirect lighting, motion sensors, etc.. (T5 is a programmed start ballast) pg. 4-7.

Frequent Switching Prolong Lamp Life UltraStart ballasts These programmed start ballasts prevent short life due to frequent starts.

Fluorescent Systems Upgrades

T8 System on Electronic Ballast

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T5 LAMPS

•SMALLER IN DIAMETER

• SMALLER LUMINARES

•GLARE ISSUE

• ONLY INDIRECT FIXTURES

•MORE EXPENSIVE LAMP

• 2 LAMPS MORE THAN 3 T8s

•MORE EXPENSIVE FIXTURE

•MAY REDUCE FIXTURE #

•COST IS COMING DOWN

•MORE EXPENSIVE BALLAST

•BEST PERFORMANCE 95 F

•ALWAYS PROGRAMMED START

T8 LAMPS

MORE COMMON

LESS WARM UP TIMIE

MORE FIXTURE OPTIONS

MORE BALLAST OPTIONS

LESS EXPENSIVE TO MAINTAIN

MORE RETROFIT OPTIONS

BEST PERFORMANCE 77 F

MORE MATERIAL=MORE WASTE

MORE DIMMING OPTIONS