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Whats the difference between ....

Discussion in 'Lighting' started by Paul Hovnanian P.E., Jan 24, 2005.

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  1. .... a G36T6L lamp and a G36T5L lamp?

    I have a water purification system that specs the G36T6L but various
    suppliers have offered the G36T5L lamp as an equivalent. Is this true? I
    Googled both P/Ns but couldn't find a single site with specs on both.
    Comparing across different sites, the G36T6L is a 39 Watt lamp (425 mA
    lamp current) with 13.8 Watts UV output @ 254 nm wavelength. The G36T5L
    (from a different web page) is a 39 Watt lamp with 12 Watts UV output
    (no wavelength spec'd). Are they equivalent?

    Also, the first site (
    listed the UV output at 120 uW/cm^2 at 1 meter from the lamp.
    Calculating the total UV output through a 1 meter radius spherical
    surface, I get 15.0 watts, not the 13.8 Watts they published in the next
    column. Why the discrepancy?
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