Light Technology
    Light Technology
    High-Pressure Sodium
    Metal Halide
    Bulb Shape
    Bulb Shape
    TubularCone
    Manufacturer Equivalent
    Manufacturer Equivalent
    Osram/Sylvania
    General Electric
    Philips
    For Ballast ANSI Number
    For Ballast ANSI Number
    S51
    S50
    S54
    S55
    M59
    S66
    S62
    S68
    Bulb Shape Number
    Bulb Shape Number
    T14 1/2
    ED23 1/2
    ED18
    E25
    End-of-Life Operation
    End-of-Life Operation
    Cycling
    Non-Cycling
    Rated Life @ 3 Hours per Day
    Rated Life @ 3 Hours per Day
    18.2 yrs.
    27.3 yrs.
    36.5 yrs.
    73 yrs.
    Restart Time
    Restart Time
    1 min.-5 min.
    15-20 min.
    Instant
    Color Temperature
    Color Temperature
    1,900K
    2,100K
    4,000K
    Estimated Yearly Energy Cost
    Estimated Yearly Energy Cost
    $48.18
    $30.11
    $12.05
    $18.07
    $24.09
    $8.43
    $6.02
    For Ballast Type
    For Ballast Type
    Electronic
    Magnetic
    Initial Start Time
    Initial Start Time
    1-5 min.
    1 min.-5 min.
    Color Rendering Index
    Color Rendering Index
    22
    65
    DFARS (Defense Acquisition Regulations Supplement)
    DFARS (Defense Acquisition
    Regulations Supplement)
    Bulb Diameter
    Bulb Diameter
    2 1/4"
    2 15/16"
    Overall Length
    Overall Length
    7 3/4"
    9 3/4"
    Light Appearance
    Light Appearance
    Warm
    Neutral
    Operating Position
    Operating Position
    Base Down
    Base Up
    Horizontal
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    15 Products