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    Bulb Shape Number
    Bulb Shape Number
    BT28
    BT37
    BT56
    Base Type
    Base Type
    Screw In
    Bulb Shape
    Bulb Shape
    Blown Tubular
    Manufacturer Equivalent
    Manufacturer Equivalent
    Philips
    Osram/Sylvania
    General Electric
    Venture
    For Ballast ANSI Number
    For Ballast ANSI Number
    M47
    M48
    M57
    M58
    M59
    M141
    M149
    S52
    S111
    Color
    Color
    Clear
    Frosted
    Screw-In Base Size
    Screw-In Base Size
    Mogul
    Light Technology
    Light Technology
    Metal Halide
    Base Number
    Base Number
    E39
    EX39
    Color Temperature
    Color Temperature
    3,000 to 3,499 K
    3,500 to 3,999 K
    4,000 to 4,999 K
    Operating Position
    Operating Position
    Horizontal
    Base Up
    Base Down
    For Ballast Type
    For Ballast Type
    Electronic
    Magnetic
    Rated Life @ 3 Hours per Day
    Rated Life @ 3 Hours per Day
    2.7 yrs.
    9.1 yrs.
    10.9 yrs.
    13.6 yrs.
    16.4 yrs.
    18.2 yrs.
    Metal Halide Enclosure Rating
    Metal Halide Enclosure Rating
    Enclosed Fixtures
    Open Fixtures
    Bulb Diameter
    Bulb Diameter
    3 1/2"
    4 5/8"
    7"
    Light Setting
    Light Setting
    Dimmable
    Bulb Material
    Bulb Material
    Glass
    RoHS (Restriction of Hazardous Substances)
    RoHS (Restriction of
    Hazardous Substances)
    RoHS Compliant
    RoHS Compliant with
    Exemptions
    REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)
    REACH (Registration,
    Evaluation, Authorization
    and Restriction of Chemicals)
    REACH Compliant
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    14 Products