Jump to content

Welcome to Grasscity Forums - Register now for FREE
Register now to gain access to all of our features, it's FREE and only takes one minute.
Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more. This message will be removed once you have signed in.
Create an Account

Grow tent vs Wattage on MH/HPS


  • Please log in to reply
 

#1
azcactus

azcactus

    Registered User

  • Registered Upgraded
  • 1,369 posts
If my grow tent is 2'x 4' x 5' will a 400 watt HP/MHS system like this on ebay for $155 free shipping be a sufficient enough light for a 3 bucket grow? Reply only please if you have actual knowledge. I don't need an "I think." I already think it will, but need your input. Are grow tents and light kits from ebay any good?


400w 400 watt HPS MH Grow Light System Set Premium Kit Dimm Green House - iPower
Wing Reflector / Cool Tube / Air Cool Hood.

#2
Doc-J

Doc-J

    Dont mind me, Im fucked up on cornbread

  • Registered Upgraded
  • 5,542 posts
It will work, but is slightly out of the optimum range of a 400w on the side(s). 400w really only covers 2 x 2 to 3 x 3, and wont spread well across 4ft. Keep them all as close as you can without blocking light from one another, maybe scrog them towards the center or vertical and you should be fine. My first grow was in a 4 x 2 closet with 3 plants and the plants did decent but there wasn't a lot of free space. A lot of how much light and space is needed depends as much on how large you plan to grow them as anything.

#3
azcactus

azcactus

    Registered User

  • Registered Upgraded
  • 1,369 posts
So do you think going to 600 W would cover it all ok?

#4
Doc-J

Doc-J

    Dont mind me, Im fucked up on cornbread

  • Registered Upgraded
  • 5,542 posts

So do you think going to 600 W would cover it all ok?


That is what I would go with personally as long as you can keep heat under control. Hid lights get pretty hot so plan on needing a cooled hood and good inline exhaust fan.

Maybe even look into an adjustable 600w ballast then if you want you can cut it down to 75% or 50% power.

#5
azcactus

azcactus

    Registered User

  • Registered Upgraded
  • 1,369 posts
So what about a 4 tube T5 set up that is 2' long? Would that direct enough light at 3 plants you think?

Edited by azcactus, 27 July 2012 - 10:51 PM.
T5 not T4


#6
gwam333

gwam333

    Registered User

  • Registered Upgraded
  • 151 posts
Check around. There are 600w dimmable from apollo available for 140-170 on amazon as well. That's what I went with and am doing 4 plants in 4x4.

#7
Doc-J

Doc-J

    Dont mind me, Im fucked up on cornbread

  • Registered Upgraded
  • 5,542 posts

So what about a 4 tube T5 set up that is 2' long? Would that direct enough light at 3 plants you think?


Not in my opinion. Some people love t5 lights, but they just don't compare to hid lighting in terms of output per Watt.

#8
EL Capitano

EL Capitano

    Mr. RCW 69.51a

  • Registered Upgraded
  • 1,098 posts
600w ipower mh/Hps is what I run..

Heat might be an issue but as long as you keep the air moving I think it'll be fine...

#9
tokengator

tokengator

    Registered User

  • Registered Upgraded
  • PipPipPip
  • 37 posts
would a 1000 watt bulb with a fan still be too hot? Or a 400 and a 250 watt hps system be the better avenue?

#10
CL4P-TP

CL4P-TP

    Interplanetary Ninja Assassin

  • Bronze Member
  • 7,758 posts


#11
tplat

tplat

    Registered User

  • Registered Upgraded
  • 7,711 posts

Not in my opinion. Some people love t5 lights, but they just don't compare to hid lighting in terms of output per Watt.


T5`s are great to a certain point. For seedlings, clones and short term veg growth they work great but once plants get around 2.5-3 feet or taller the lower growth will start to suffer from the lack of light penetration. I have a 100 watt 2X2 4 bulb T5 grow light I use for seedlings and small clones I also have a 452 watt 8 bulb 2X4 grow light that I use for short term vegging and a mother plant. For flowering they go under the 1k HPS light to finish out.

#12
Doc-J

Doc-J

    Dont mind me, Im fucked up on cornbread

  • Registered Upgraded
  • 5,542 posts

T5`s are great to a certain point. For seedlings, clones and short term veg growth they work great but once plants get around 2.5-3 feet or taller the lower growth will start to suffer from the lack of light penetration. I have a 100 watt 2X2 4 bulb T5 grow light I use for seedlings and small clones I also have a 452 watt 8 bulb 2X4 grow light that I use for short term vegging and a mother plant. For flowering they go under the 1k HPS light to finish out.


Sure they will work. I just prefer only having to use one light and grow area. The power difference is nominal to me and the seedlings grow quite quickly under 600w. They make more sense if maintaining mothers or a sepeeate veg or clone area. They just aren't worth it to me to purchase new lights I am only going to use a few weeks out if each grow when the light I have puts out more lumens.


1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users