Indoor Yield-O-Rama

Logo Lumens Per Watt (LPW)*
(For total available lumens see the Available Lumens Table)

Bulb Type

Avg

Hi

Lo

Bulb Wattage

1500

1000

940

600

430

400

360

250

220

175

150

100

70

>=40

<40


Standard High Intensity Discharge Bulbs

 

 

HPS & Agro

123

150

65

 

135

 

145

121

123

 

112

 

 

107

92

87

Metal Halide

96

125

68

103

120

 

 

 

96

 

84

 

83

 

81

71


Conversion High Intensity Discharge Bulbs

HPS for MH ballast

125

138

97

 

 

138

 

 

 

125

 

111

 

100

 

 

MH for HPS ballast

96

119

68

 

118

 

 

 

96

 

79

 

 

 

 

 


Fluorescent Bulbs

Standard

80

100

20

CW & WW

80

59

Specialty

40

59

14

Gro, Agro, Aquarium, Terrarium

45

35

 

Footnotes

4

4

4

 

 

3

 

 

 

3

 

3

 

3

 

 

1

2

* Values are Initial LPW averages taken from several samplings of each bulb, actual values vary with manufacturer and time. Check current stats for several brands before deciding on a bulb. Mean LPW for sampled bulbs are appx 10-15% lower than Initial LPW for HPS and Fluoros, and appx 25-35% lower for MH.
1 - Greater than or equal to 40W (usually 4 feet or longer, can include some compact versions)
2 - Less than 40W (usually less than 4 ft long or screw-in, stick, or circular compact versions)
3 - 940,360,220, and 150W HPS conversion bulbs for use with 1000,400,250,175 MH ballasts respectively.
4 - Figures under the Avg column are LPWs for the most common middle-of-the-road lights (400watt HIDs and 40watt FLOR tubes). Hi/Lo figures are LPW extremes from all sampled wattages for that bulb type.

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