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Thread: How long does a bulb life last for !!

  1. #1

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    Question Answered: How long does a bulb life last for !!

    Iv had my hps bulb for about 6-7 months and keep thinking its not as bright as it used to be and my plants look small please advice ...

  2. "Ok it sounds like your probably due for a change. I was recomended to change bulbs every 2 grows.. I cant provide proof but am pretty sure Ive seen threads on here stating how many hours till they lose efficiency enough to warrant replacement. I keep 2 the 2 grow rule as a long time ago I used my first globe for 2 years and being a stoner didnt even think that that was the reason why I didnt produce anywhere near what I used to."


  3. #2

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    What light cycle does the globe run eg how long at 18/6 and how long at 12/12 ?

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    scottishlass29 (22-05-13)

  5. #3

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    Im on my 3rd grow normally first 2-3 weeks 18/6 8-9 weeks 12/12 ..

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    Hillbilly Guest

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    Most times about 6 months you should replace the bulb. That is if I remember right but I am tired and going to be a lazy arse and not checking to make sure. lol

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    scottishlass29 (08-12-12)

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    Ok it sounds like your probably due for a change. I was recomended to change bulbs every 2 grows.. I cant provide proof but am pretty sure Ive seen threads on here stating how many hours till they lose efficiency enough to warrant replacement. I keep 2 the 2 grow rule as a long time ago I used my first globe for 2 years and being a stoner didnt even think that that was the reason why I didnt produce anywhere near what I used to.

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    scottishlass29 (08-12-12)

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    Thanks ill thought so so ill get a new one real soon thanks ...

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    Ozgrower (08-12-12)

  12. #7

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    1 question when i got my light it is a hps duel light does anybody think it makes any diffrence or is it better to get veg bulbs and flower bulbs cheers .....one othere thing every time i put a post up and go back and look there is a long list of numbers next to the post iv put up what does it mean

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    Yeah I would.. keep your girls happy.

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    is it a bad thing to put up so many pics and say how well there doing up .

  16. #10

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    HPS lamps last a long time...

    Here are some typical lumen maintenance figures (Osram NAV-T SUPER 4Y 400 Watt):

    2,000 hours 98%
    4,000 hours 97%
    6,000 hours 96%
    8,000 hours 95%
    12,000 hours 94%
    16,000 hours 94%
    20,000 hours 94%

    And here's a table to convert those hours into something a bit more useful:

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    babybud3232 (08-12-12), jibbers (09-12-12), scottishlass29 (08-12-12)

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