How close can I put my HPS?
- Thread starter NorCal510
- Start date
You can have it low as you can as long as the heat of the light won't burn the leafs. The best way to do that is making sure you using a air cool vent plus nice fan to keep it cool. Then you need a small outside fan to blow on the plant itself. This method will keep the plants cool.
GlassFreak
Well-Known Member
dont go much over 80 or u might be entering dangerous territory.
panhead
Well-Known Member
About room temps It depends heavily on the strain but 80 degrees is perfect,the reccomendation of 70 degrees is way too cold & your plants will experience a slowed growth pattern.
For the distance between the light & the canopy you should not go by the feel no pain method as it is not allways a true indicator & can roast the shit out of the canopy & damm fast too,once its roasted there is no going back,you should get a $5 old school mercury thermometor from home depot & hold it flat on top the canopy surface for 5 minutes,this will give you an accurate reading of surface temps at the canopy.
Keep the surface temp at the canopy at 80 degrees or a little less & your good to go safely.
panhead
Well-Known Member
Again its strain dependant,the problem is that after 80 degrees your pushing it into the red line,the strain may be able to safely take 88 degrees but without knowing for sure its safer to stay at 80 degrees or a little less.
panhead
Well-Known Member
You should research bubblegum & see if there is any pertainent info regarding weather it can take high heat or not,maybe shoot an email to a breeded of the strain ,or the seedbank you bought the seeds from,i dont grow that strain so i'd only be guessing.
Wretched420
Well-Known Member
i always thought 78-82 is good temps to stay between i live in 100+ weather so 80 is pretty nice
Hayduke
Well-Known Member
I have a 400w hps with a HTG euro hood that has glass and air cooled. I pull air off top of plants through hood and out, with 2 50cfm fresh air blowing across tops. My temps stay at 77 at canopy top (though this is digital and maybe should also check "old school") I am 12" from light, I get occasional browning on the very tip of new growth. Not enough to really hurt, so I would not go closer than 12". ***I can hold my hand much closer without pain.
Wretched420
Well-Known Member
rolla8
Well-Known Member
Yeah, I was actually quite surprised I was able to get them that low without issue. My two lights are setup "inline" with a 465cfm blower pulling carbon-scrubbed air from the room through the hoods and into my house's chimney. Like I said, with this setup my canopy temps never go above 78°F, which is only 5° higher than the ambient room temp.
