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Thread: Light chart's

  1. #11

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    This is another useful one nicked from somewhere...
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    Smoking weed doesn't take my problems away, but it does stop me being arsed about them!

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  3. #12

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    I have a couple more lighting charts I will try and dig out.

  4. #13

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  6. #14

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    Great post Darko mate..

  7. #15

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    Here are a couple more light charts. Hope they are accurate enough:



    'there was a young man named jobby,
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    he put our plants to shame,
    that bright young man named jobby'

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  9. #16

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    Ok, thats sweet, 18 cm discance from a 250w HPS should be perfect then!

  10. #17

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    will i tbe ok to just grow under a 500w HPS lighting system though as a friend of mine use to do sensi star and only ever used a HPS light so am a bit confused as i am new to all this lol.

  11. #18
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    good and informative post

    i recently bought a light meter on ebay and started doing some reading on the 250 watt mh i currently use for my mother plants

    i was kinda shocked to se how rapidly the light intensity decreased on just smaller distances

    if i remember correctly there was about 100 000 lux about 10-15 from the bulb ( i measured the early spring sun and its just above 100 000 already and probably peaking higher in full summer)
    just 50 centimeters away the rest of the plants only had like 1/10 of that from the bulb

    the result is that now the sun is getting strong i carry them out in trays to get full sunlight from 10-19
    then they go back under artificial light again
    going to replace the 250 mh soon with a 125 watt cfl as they get plenty of sun most of the day now when carried out so the last hours are just maintance so i can save some money on power by replacing the bulb and carry them out for ful sunlight

    btw you guys might also want to check this out
    i was also very surprised when i saw it
    i though bulbs lasted significant shorter



    interesting to se how many days and hps can actually run under 12/12 and the same for mh at 18/6
    as expected the hps lasts at least 3x the mh but still i was surprised when i saw this

    even if we set the amount of decrease in % as low as 10% to determine on when to replace they last a lot longer than i thought
    especially for the hps

    before i hear something like do 2 grows with an hps ( 2x8 weeks on 12/12) then ditch it
    but this more indicates that an hps will last more than 2 years on constant 12/12 if we ditch them when they have lost 10% in output
    Last edited by M_C; 06-12-14 at 11:25 PM.

  12. #19

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    love this site and this thread is just one reason why, but does anyone else look at these and get all confused who ever said growing weed is easy lol!

  13. #20

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    Growing weed is easy but growing it to the best of its potential is a little harder even with the best genetics.
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