Madagascar
Well-Known Member
i have a 600 watt hps w a sunsystem cool hood 6 in, whats the maxiumum size for this light?
Need help with tent size
- Thread starter Madagascar
- Start date
Connoisseurus Rex
Well-Known Member
4x4 is all I would do.
elkamino
Well-Known Member
4x4 is good. But if you have room for it a larger tent is easier to work in and cool. I have a 6' x 6', but usually just keep a single 400 vert in there, in a corner. Then if things get wild on me I can put in the 600 and back the girls up. Also room in there to store amendments and do potting/etc, helps keep te room clean too. 
tropicalcannabispatient
Well-Known Member
Kind Sir
Well-Known Member
Ive never seen that before, nice illustration.
elkamino
Well-Known Member
Yes except it says 2' penetration for all of them
tropicalcannabispatient
Well-Known Member
Its about right, 2 feet penetration under the canopy plus the 12-18 inches the lights have to be away from the tops is about right, after that the light isn't as useful.
elkamino
Well-Known Member
Possibly true if you're talking LEDs, like those shown in your image file. But the OP's question regards an HPS. Without looking up the #s I know that 1000w HPS bulbs penetrate more than 400w HPS.
tropicalcannabispatient
Well-Known Member
Im talking about hps, everybody knows that a 1k is better than 400 watts hps. But anyways op this is for you
Approximate fc in the sweet spot
(metered directly beneath the bulb)
Lamp Distance Foot-Candles
1000 watt HPS 1.50 foot (18 inches/45 cm) 9,000 fc
600 watt HPS 1.00 foot (12 inches/30 cm) 9,000 fc
1.50 foot (18 inches/45 cm) 5,600 fc
400 watt HPS 0.75 foot (9 inches/23 cm) 9,000 fc
1.50 foot (18 inches/45 cm) 4,000 fc
250 watt HPS 0.58 foot (7 inches/18 cm) 9,000 fc
1.50 foot (18 inches/45 cm) 2,800 fc
Highlighted items approximate the closest distance that particular lamp should be to the sweet spot to avoid over-lighting. (those interested in photosynthetic radiation can use this PPF PAR converter.)
Madagascar
Well-Known Member
^^ always wondered about the sweet spot to hps
tropicalcannabispatient
Well-Known Member
400=16cf 600=32cf 1000=48cf
elkamino
Well-Known Member
Hell, perhaps you're right but I don't think so.
Check this chart. Optimal distances (@ 5000-60000 FC) for 400's are 5-18" (13" depth) and 9-31" (23" depth) for 1000. That's almost twice the depth right? Granted its a MH but I assume similar to the HPS. This supports my experience, as I've grown larger plants under 600s than 400s or T5s.
Madagascar
Well-Known Member
When i go to amazon it doesnt say the size of the outlets for the fans to cool the system? my sun system has a 6 in for the ducting do i just tape it together.
Trying to keep it cool as possible
Connoisseurus Rex
Well-Known Member
Most grow tents have at least 1 6" duct nowadays. You could always reference the site that makes the tent.