Mercury Vapour Bulbs

Discussion in 'General Reptile Discussion' started by alex.snaith, Mar 16, 2017.

  1. CrazyNut

    CrazyNut Well-Known Member

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    I think they are suposedly uvb + heat... As in an all in one globe.
     
  2. kingofnobbys

    kingofnobbys Well-Known Member

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    actually heat, bright sunlike yellowish light, very good UVA and UVB levels given off , supposed only bettered by natural midday sunlight. So all in one light source , only negatives are
    --- internal circuitry means they must cool off before being restarted
    --- can't use a thermostat to moderate the heat output from them
    --- a lot tend to be not so durable
    --- a lot tend to have very short lifespans
    --- light UVA and UVB tends to focused on narrow beam
    --- can be quite pricey per unit
     
  3. alex.snaith

    alex.snaith Not so new Member

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    I really want to use them with a thermostat ahaha, can risk my little guys getting too hot :)
     
  4. kingofnobbys

    kingofnobbys Well-Known Member

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    .... the MVB will shut off and simply wont turn back on if you trying to control it with a thermostat, so more than the little guys will get no light, no UVA , no UVB and not enough heat to digest their food and will probably think it's winter and go into brumation.
     
  5. CrazyNut

    CrazyNut Well-Known Member

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    Why can't you use a thermostat? Lol I was going to suggest a dimmining thermostat to solve the longetivity point (which is a fair point). Yeh they are expensive as I said but they are more of an all in one than mercury vapor bulbs, so if I was looking for an all in one, I'd more inclined to go with the sunray. Most MVB's are either only good for heat or only good for uvb, not both. I think they also have the longetivity problem.... You could probably extened the life with dimmining thermostat.
     
  6. alex.snaith

    alex.snaith Not so new Member

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    They cant be used with dimming.....they use a self ballasting chamber inside which means they cant be dimmed...
     
  7. CrazyNut

    CrazyNut Well-Known Member

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  8. CrazyNut

    CrazyNut Well-Known Member

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    Sunray or MVB? I thought MVB had a self ballasting chamber? Or do they both?
     
  9. alex.snaith

    alex.snaith Not so new Member

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    I thought they both had it? Correct me if I'm wrong
     
  10. CrazyNut

    CrazyNut Well-Known Member

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    I have no idea lol I just rember the self ballasting and MVB bulbs being connected in some way lol
     
  11. Bushfire

    Bushfire Well-Known Member

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    You can control this by the distance between the bulb and basking site (controls the basking site temp) and generally by ventilation (controls the the ambient temp). You will as with other bulbs have to play around with wattages to meet your basking temp needs but not have too much heat lost in very well ventilated cages.
     
  12. Bushfire

    Bushfire Well-Known Member

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    Sun Ray are metal halides not mvb but have similar restrictions like the mvb. The metal halides normally need an external ballast to work. They have a pricey start up costs but replacements are normally cheaper and running cost cheaper as they are lower wattage bulbs but produce a much better light colour than mvb and produce more heat than the mvb comparsion.

    I run all my lizards on metal halides probably for the last 3 yrs or so. Bulb lifespans and UV decay are also much better with metal halides than mvbs.
     
  13. CrazyNut

    CrazyNut Well-Known Member

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    How much do metal halides usally cost to start up @Bushfire ? Other than sunray (Sunray is really exepensive lol). I've always used a phillips heat globe and a 10.0 uvb (or 5.0 depending on the uvb requierments). Although I've also used ceramic, infrared, and neodymium globes. Only for heat though. MVB's never took my fancy, I've always chased cheap and effective haha
     
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