Example FTL and Ballast Specs for EE Procurement Satish Kumar, Ph.D. Lawrence Berkeley National Laboratory Energy Efficient Procurement Workshop Mumbai, India September 20, 2005

EE Specifications for FTLs in China Rated Power (W) Minimum Initial Lumen Efficacy (lm/W) Daylight (6500, 5000k) Cool (4000, 3500k) Warm (3000, 2500K) 14~ ~ ~ Lumen maintenance must be no less than 80% after 2000 hours of usage

Energy Efficient FTL Procurement and Usage Tips FTLs must be matched with appropriate ballasts to ensure ideal usage efficiency and long lamp life Lamp surface should be clean with no air bubbles on glass Interior phosphor coating should be fine and without any evident granules and of white color An EE lamp with a pre-heat starter circuit can prolong the lamp life Recommended color range for lamps is in the range of 4000 ~ 5000K Avoid turning FTLs on and off frequently If the ends of FTL become black, it should be replaced Lamp breakage should be avoided because the FTL contains poisonous substance mercury

Cost Saving Example for FTLs IndicatorOrdinary Model Energy Efficient Model (Triphosphorous) Tube and Ballast Type T12, 40 Watts (magnetic ballast) T8, 30 Watts (electronic ballast) Rated lumen output Actual lumen efficacy (lm/W)5277 Input Power4630 Annual Energy Consumption (kWh) Annual Energy Cost (Rs.) Lifetime Energy Cost (Rs.) Lifetime Cost Savings (Rs.) The energy costs in the table above are calculated on the assumption that the FTL is used 1200 hours per year. The electricity price is assumed at Rs.4.50/kWh. The lifetime energy cost is the sum of annual energy costs and assumes a lifetime of 7 years for the FTLs

BEE Recommendation to CPWD for FTL Efficiency Lamp Wattage6500k4000k2700K T8, 36 Watts> 3100 lumens> 3200 lumens T8, 18 Watts> 1250 lumens> 1300 lumens Lumen maintenance 90% after 2000 hours of usage and 85% after 70% life

BEE Recommendation to CPWD for Ballast Efficiency The electronic ballasts must meet the performance standards for the ballast lumen factor, the total circuit power and limits of harmonics current as specified in IS (Part 2): 1991 (Reaffirmed 2000) and electro magnetic interference limits as specified in IS The ballast factor also called ballast lumen factor (BF) for subject ballast is the ratio of the light output of a lamp tested on subject ballast to the light output of the same lamp tested on” reference” ballast under identical environmental conditions. As per IS (Part 2): 1991 (Reaffirmed 2000), this BF value should not be less than 90 %. BF values may go up to 105 %. Ballast Efficacy Factor (BEF) is a measure of ballast system performance or efficacy. BEF may not be indicated in the manufacturer’s literature and must then be specified or requested. Only electronic ballasts meet the recommended efficiency levels.

BEE Recommendation to CPWD for Ballast Efficiency Ballast Efficacy Factor = ballast factor in percent/ballast input power in Watts Lamp Type# of LampsRecommended BEF T8, 36 W or higher 21.3 or higher 30.8 or higher or higher

FEMP Ballast Recommendation

ELI Electronic Ballast Recommendation Frequency> 20 kHz Power Factor> 0.90 Total Harmonic Distortion   32% In-rush current  20 A for < 3 ms Current Crest Factor  1.7 Voltage variationMust operate within specified parameters at a range of nominal voltages up to 15% higher or lower than rated operating voltage without reduction in rated life (as by IEC 60929) SafetyBallast shall comply with applicable parts of IEC – 60920, 61547, and all local requirements. WarrantyMinimum 3-year replacement warranty including a labor allowance for electronic ballasts that fail early due to manufacturer defect. Manufacturer shall apply a label with basic warranty terms and a local telephone number to each ballast, written in at least one applicable local language.