600w HPS takes 2 hrs to start

Discussion in 'General Marijuana Growing' started by chimayred, Feb 13, 2013.

  1.  
    chimayred

    chimayred Member

    Hi guys,

    I have 4x600W HPS lights. split in two pairs they are started by two timers. Start times are about a minute or so apart.

    All was well for a while, but then one of these would start taking approx. 2 hrs to light up. It would carry on OK for the remainder of the "day time". Replacing the bulb, replacing the timer, power board - does not help.

    Any ideas ?

    Cheers
  2.  
    jondamon

    jondamon Well-Known Member

    Ballast?


    Seems like the last thing you haven't tried replacing.



    J
  3.  
    gagekko

    gagekko Well-Known Member

    Haha... Why would you wait so long to replace ballast? Maybe you wanna stress the plants and get some hermies?
  4.  
    jondamon

    jondamon Well-Known Member

    Well read! Lol.

    He's using 4x600w. So one not working properly isn't going to stress them too badly as there is still 1800w being run.



    J
  5.  
    chimayred

    chimayred Member

    Thanks for replying :)

    Indeed, might try the ballast. Though from what i understand those things either work normally or not at all...
  6.  
    Figong

    Figong Well-Known Member

    How long is 'a while' regarding it working? Have you moved or touched the light? Sounds like the bulb could just be a bit loose in the socket.. make sure it's cool to the touch and use latex or something in the way of a glove that will not leave oil.. check how tight it is in the socket. If it's still difficult to turn but you can feel a lil' bit of play, a light.. and I do mean -very- light amount of graphite on the bulb base should allow you to properly seat it. Assuming that's not it, I agree with the other posts which point to ballast or high-voltage ignitor, more specifically. Are you getting any hum out of it at all, or not even a hum? (re: the ballast)
  7.  
    chimayred

    chimayred Member

    Man, this might actually be it - will check the bulb is properly in and let you know. Thanks so much for your input !
  8.  
    Figong

    Figong Well-Known Member

    Have seen bulbs not seated completely causing this, so I wouldn't rule it out - all else fails we rule out the seating of it as an issue :D
  9.  
    Bigby

    Bigby Well-Known Member

    LOL - indeed. :P

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