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JBL UVB 190 ?? Meaning of the Numbers

Discussion in 'Habitat Lighting' started by Heidi01, Apr 5, 2013.

  1. Heidi01

    Heidi01 Active Member

    What does this mean in English terms so the lay person can understand please?

    JBL ReptilJungle UV 190 = 5.0 (190 µW/cm2 at a 5 cm distance, 20 µW/cm2 = natural in 20 cm) 15 W, 6500 K, medium UV-A and UV-B concentration.

  2. Renouji

    Renouji Elite Member

    It loks like its a measurement of UV density at various distances
  3. RomanLA

    RomanLA Elite Member

    This is the important part...
    That's the level of UVB at 5cm from the lamp. You can see it drops off quickly at 20cm. Plus, you'll filter out 30-40% of that amount, if you're putting the lamp on a screen. To give you an idea, the amount of UVB radiation received at the equator on a clear day at noon is 270mw/cm2 (source).

    If this is for a large enclosure, like the typical 6ft high recommendation for a water dragon, it pretty much takes T5 high output lighting to push a decent amount of UVB down deep into the enclosure. Here's a nice comparison of various T5 and T8 bulbs and the exposure at various distances. There's lot of good information on that site, including a lighting guide and they're great about answering questions specific to your enclosure.
    T5 vs T8

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