TABLE 7. HIGH PERFORMANCE MH, T5HO & T8 HIBAY COMPARISON. SOURCE: Stan Walerczyk

Following are some examples

lamp, ballast & dome/reflector type

EOL

EOL

EOL lamp

actual

EOL

lamp

lamp

luminaire

Lamp life

initial

initial

lamp

EOL

lumin-

EOL

luminaire

luminaire

task

(hours at

total

total

lumen

total

aire

lamp

sys-

lumens

task

modified

10-hour

lamp

lamp

maint-

lamp

effic-

luminaire

tem

per

S/P

modified

lumens

cycles)

CRI

lumens

BF

lumens

enance

lumens

iency

lumens

watts

watt

Kelvin

ratio

lumens

per watt

320W quartz PS MH lamp, magnetic reactor ballast, high performance dome

20,000

65

32,000

1.00

32,000

65%

20,800

92%

19,136

345

55

4000

1.65

28,280

82

320W quartz PS MH lamp, electronic ballast, high performance dome

20,000+

65

32,000

1.00

32,000

70%

22,400

92%

20,608

333

62

4000

1.65

30,456

91

high Kelvin quartz 375W PS MH lamp, electronic ballast, high performance dome

20,000+

90+

31,500

1.00

31,500

70%

22,050

92%

20,286

383

53

5000

2.10

36,185

94

400W quartz PS MH lamp, electronic ballast, high performance dome

20,000+

65

43,000

1.00

43,000

70%

30,100

92%

27,692

413

67

4000

1.65

40,925

99

250W ceramic MH lamp, electronic ballast, high performance dome

15,000+

94

24,000

1.00

24,000

80%

19,200

92%

17,664

260

68

4200

1.86

28,662

110

400W ceramic MH lamp, electronic ballast, high performance dome

20,000+

92

34,000

1.00

40,000

80%

32,000

92%

29,440

413

71

3700

1.82

46,967

114

4 F54T5HO lamps, electronic ballasts, enhanced aluminum reflector

24,000

85

20,000

1.00

20,000

93%

18,600

92%

17,112

234

73

5000

1.90

28,231

121

6 F32T8 lamps, electronic ballasts, enhanced aluminum reflector

28,000

85

18,600

1.15

21,390

92%

19,680

91%

17,909

220

81

5000

1.90

29,546

134

Notes

BF stands for ballast factor and EOL stands for end of life.

High performance domes include clear prismatic, metal faceted or glass lined metal faceted.

IMPORTANT! Fluorescent lamp lumens are based on optimal temperatures & can be adjusted with lumen/temp tables provided by manufacturers.

Luminaire dirt depreciation could be included if you know it.

All line voltages considered to be 277V.

End of life luminaire task modified lumens = end of life lamp luminaire lumens x (S/P) .78 [.78 exponent]

Prepared by Stan Walerczyk for "Hibays -It's All About The Details" and modified later.