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Lumen Loss from Air cooling?

Discussion in 'Grow Room Design/Setup' started by Indi420, Oct 24, 2014.

  1. #1 Indi420, Oct 24, 2014
    Last edited by a moderator: Oct 24, 2014
    A few weeks ago I switch from open hoods on my 1000 and 600s to Air cooled. I'm running a lot of really cold air through the lamps and the hoods are Cool to touch.
     
    I just feel like my light foot print and just general brightness in my area is less. I don't even wear sunglasses anymore and before with just regular batwing reflectors it was a must.
     
    I liked the small reflectors because they are very light weight and really open up my room. The air cooled hoods are just so hulking and  all the ducting is just meh. Might go back to my open hoods in a few weeks once these plants finish up and before moving the new crop in.  Its winter so maybe just open intake and exhaust will do the trick.
     
    I'm just curious has anyone noticed a direct impact moving from open to air cooled reflectors?
     
    I guess the advantage  is the buds are almost touching the glass but I dont know. Just feels...dim.
     
    Is there a such thing as too much air cooling? I mean my room wont get above  73 with the 1000 and 600 on and its a pretty small space.

     
  2. Maybe put in a speed controller for the fan?
     
  3. I bought this one in case my room is too cool. That way you can keep some of the heat. I don't know. I guess you'd have to find the right setting ya know?
     
  4. IMO I would only ever run a cool tube/hood if I couldn't find other ways to handle the temps. If the temps aren't an issue I would rock a parabolic reflector. I read somewhere that the temps would have to be ridiculously cold in order to effect your lumen output of the bulbs and even then the only real affect would be that it would take a little longer to heat up. 
     
  5. Using air cooled hoods or cooltubes means the light has to pass through an extra layer of glass/acrylic which can cause light loss of between 5 - 15% depending on design. Less for thin tempered glass, more for acrylic.
     
  6. Speed controller to get more light?
     
    Anytime you add glass you will lose some light, but it should not me enough to be a game changer. I bet it has more to do with the reflector on your hood than the glass. Bat wings tend to do a great job reflecting light, and lots of cool-tubes come with crappy small wings.
     
    Your temps are good.
     
  7. #7 Baroness Blossom, Oct 27, 2014
    Last edited by a moderator: Oct 27, 2014
    If you get an LED they don't give off heat, you don't even need to vent. Save yourself time and money!! Get an LED and sell your other lights, get your money back!! You can put your plant as close to the light as you want, which means closer internodes, bushier plants, bigger yield. Check my blog if you want, I use them now, after 7 months of extremely hot tents and even lost a plant in bloom due to the excess heat. LED all the way! http://forum.grasscity.com/blog/10101-randicalliburs-indoor-grow-lovers-blog/
     
  8. If you don't vent how do the plants get fresh air? To be honest I'm a fan of led's myself but they still generate heat...
     
  9. A fan works great. I actually leave a door to my tent open since everything is concentrated in one area and the light is low. So I have a fan constantly going for fresh air and to strengthen the stalks and limbs
     
  10. No I didn't say speed controller to get more light.

    I was saying use it if the room was too cool. Maybe heat it up a little.
     
  11. This is from your blog...


    "Nice bit of kit what LED are you using?

    This is a 90w, nothing special, I just got it on ebay, it was like $70. I would like to get a name brand one at some point but I just don't have that kind of money."


    And that's why you don't have that kind of heat. Your lamp is a 90 watt.
     
  12. #12 Baroness Blossom, Oct 27, 2014
    Last edited by a moderator: Oct 27, 2014
    That's actually just in my bloom room, which is smaller. I also have a 400 watt in my veg room, I can touch it whenever I want, so that room also is very cool
     
  13. Did you happen to notice the size of the room? Its oy 2x4x6, and that 90w is an equivalent of a 150w bulb, just like the 400w is like 600. That's a lot of power, heat, and wasted light. Plants only use 20% of the light from a bulb, why not just concentrate it?!
     
  14. They use 20% of a HPS. 90% of the LED IF the LED is in the correct spectrums.
    In a 2x4 x6 I would put more than a 90.
     
  15. #15 Rumpleforeskin, Oct 27, 2014
    Last edited by a moderator: Oct 27, 2014
    Equivalent, lol :laughing: . Something no commercial grower seems to know.
     
    The op was talking about light,, not keeping his room cool.
    "Speed controller"... Buy the right fan and use a thermostat.
     
  16. Yes, buy the right fan. But the OP has a fan already.
    Merely a suggestion.
     
  17. #17 Rumpleforeskin, Oct 27, 2014
    Last edited by a moderator: Oct 27, 2014
    I would rather see a way over kill fan hooked to a cheap thermostat, than an oversized fan motor hooked to a rheostat.
     
     
    Thermostat will maintain a constant temp in your grow room. $42
     
     
    [​IMG]
     
  18. gonna have to get one.
     
  19. I run leds.. I love leds but to say leds don't give off heat is absurd. 
     
  20. #20 Baroness Blossom, Oct 27, 2014
    Last edited by a moderator: Oct 27, 2014

    Right?
     

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