
hilips LUS T8 U-Bent Lamps featuring ALTO®Lamp Technology
Or ering, Electrical an Technical Data
Color Nom. Rate Average Life (Hrs.)1Approx.
Pro uct Or ering Pack. Temp. Length 12-hr on 12-hr on Initial Design Lumen
Number Co e Watts Qty. (Kelvin) (In.) Ins. Start2Prog. Start2Lumens3Lumens4CRI Maint.
21977-4 FB32T8/TL830/ LUS/6/ALTO 32 20 3000 227⁄16 30,000 36,000 2800 2535 85 95%
21978-2 FB32T8/TL835/ LUS/6/ALTO 32 20 3500 227⁄16 30,000 36,000 2800 2535 85 95%
21983-2 FB32T8/TL841/ LUS/6/ALTO 32 20 4100 227⁄16 30,000 36,000 2800 2535 85 95%
21987-3 FB32T8/TL850/ LUS/6/ALTO 32 20 5000 227⁄16 30,000 36,000 2750 2500 84 95%
1) R ted ver ge life is the length of oper tion (in hours) t which point n ver ge of 50% of l rge s mple of l mps will still be oper tion l nd 50% will not.
2) Aver ge life under engineering d t with l mps turned off nd rest rted once every 12 oper ting hours. L mp life is ppreci bly longer if l mps re st rted less frequently.
3) Approxim te initi l lumens.The l mp lumen output is b sed upon l mp perform nce fter 100 hours of oper ting life, when the output is me sured during oper tion on reference b ll st
under st nd rd l bor tory conditions. For expected l mp lumen output, commerci l b ll st m nuf cturers c n dvise the ppropri te b ll st f ctor for e ch of their b ll sts when they re
informed of the design ted l mp.The b ll st f ctor is multiplier pplied to the design ted l mp lumen output.
4) Design lumens re the pproxim te l mp lumen output t 40% of the l mp’s r ted ver ge life.This output is b sed upon me surements obt ined during l mp oper tion on reference
b ll st under st nd rd l bor tory conditions.
BASED ON 3 HOURS PER START5
Instant Start Ballast Programmed Start Ballast
24,000
30,000
30,000
36,000
BASED ON 12 HOURS PER START2
0 10,000 20,000 30,000 40,000
Rated Average Life in Hours
Rate Average Life
hilips LUS T8 U-Bent Lamps
5) Aver ge life under specified test conditions with l mps turned off nd rest rted no more frequently th n
once every 3 oper ting hours. L mp life is ppreci bly longer if l mps re st rted less frequently.
2) See bove for footnote
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rinted in USA 4/08
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