Mars Hydro has come a long way from what they used to be. Honesty, I highly doubt you would be disappointed with the light you mentioned. I’d love to have it myself lol
1 Like
Thanks Nagel, Impala and others.
Ok so I’m settled on the tent and light.
What about the carbon filter and fan? Is it ok?
I read that you needed a dehumidifier… How does it work? Do I need much room in the tent for it?
Anything else needed to get growing? 
You might not need a dehumidifier. Do you know the humidity in the area you’re putting the tent?
I have a humidity/temperature monitor in my tent and my exhaust fan alone doesn’t let the humidity go above 65%(lights off).
Grab a Hygrometer
1 Like
Hey Kurtz,
it‘s always nice to see a fellow European here!
Regarding exhaust fans, I can recommend the Systemair K EC range! They are solid fans with a great value for money and allow setting the speed through a controller and a built in potentiometer. In your case I‘d go for either the K 160 EC or K 200 EC and a Rhino Pro carbon filter.
There’s no need for a dehumidifier or AC in a tent grow usually - at least here in Germany it’s simply not feasible with the painfully high cost of electricity.
Depending on the climate of the room you plan to set the tent up in, a classic HID-Lamp might be more suitable than LEDs though (usually in non-heated basements and garages) as it generates more heat thus also reducing the humidity. Make sure you also get some fans for air movement inside of the tent!
Cheers Barrie
1 Like
Hey Impala, I dont exactly know but I am in southern Europe on the Mediterranean so it is dry and quote hot in summers and spring. It does get a bit humid in fall and winter, especially at nights. Good tip on the hygrometer, thanks bud
Hey Barrie, thanks for stopping by! Yeah, I’m in a dry zone. If it helps, I don’t plan to grow in Summers, mainly two pheno grows, or three auto grows, from fall to spring if possible. So yeah maybe a hid would be better. Dang, lol, I thought I had it all figured out haha and that leds were the over all consensus. Are you thinking MHs or Hps, which brand would you recommend for my type of setup?
Thanks for the exhaust fan and carbon filter links.
Yeah it’ll be a unheated garage grow. I’d guesstimate it’s 15 degrees in Inter and 25 end of spring but not very humid, just a bit damp. Roger that on the fans. See you around have a good one sorry don’t know how to quote correctly yet 
1 Like
With that in mind I would definitely reccomend either a 600W HPS or 630W CMH, depending on the budget. CMH has a better spectrum but HPS can be had for less money. Also I’d definitely get the K 200 EC exhaust fan to have some additional headroom for the temperatures at the end of spring as 25°C ambient temp is pretty close to optimum for running LEDs.
Personally, I’m running a Dimlux 600W HPS fixture in my basement after last winter’s harvest was underwhelming and ever since my temperatures are a lot better. In my bedroom I’m getting good results with Sanlight LEDs.
All in all, LEDs are great but the lack of radiant heat can be just as much of a disadvantage as it can be an advantage depending on the many other factors that come into play. There’s no one-size-fits-all solution that’s perfect for every scenario unfortunately. If you plan to run LEDs in a tent with an ambient temperature below ~ 22°C that’s always going to be your bottleneck.
One more possibility to consider is building your own insulated grow box or converting a wardrobe as the fabric tents offer no insulation at all. LEDs might be a feasible option in that case.
1 Like
Hey Barrie,
Yeah that makes sense. Thank is for the heads up. It definitely gets chilly in the garage even 10 degrees in winter. Do you know of a good CMH I could get in the old continent?
Ok on the K 200 EC, do you have a link to purchase it please?
And the rhino carbon filter 
Did you mean 25 is optimum for hids or leds? 
About the tent, I was gonna get the Mars hydro One, but now that I might not get their leds, I don’t have a preference. if you have a better one, even a bit more money, it’s all good 
1 Like
I don’t have any personal experience with CMH, but since I’m verry happy with my Dimlux HPS fixture I’d reccomend taking a look at their CMH fixtures.
Since I don’t know what country you are located in, here’s the link to Systemair’s website for the fan: K Circular Duct Fans · Systemair
The Rhino filters are sold by pretty much any growshop i’ve come across, you should make sure to get one that’s suited to the airflow you’re planning to use, which will probably be around 350-400m3/h. Also you’ll need a reduction piece so the 125mm filter fits on the 200mm fan, and 3 hose clamps (2x 200mm, 1x 125mm) as well as suitable ducting.
25°C is optimal for LEDs as they will push that temperature to ~28°C, with them you want a temp of 27-30° in the tent. With HIDs you want it a bit cooler as they emit radiant heat wich directly heats up the leaf surface and makes them warmer than the air temperature in the tent.
Personally I use a Homebox tent and am satisfied with it, but i think there are a lot of decent tents out there. Important things to look out for are the quality of the zippers, number and size of the openings for ducting, thickness of the material as well as the maximum weight the frame can hold.
Hope I didnt forget to mention anything important!
cheers
1 Like
The fire ball is good to have. I would make sure that I run breakers. A good surge protector. MH lights are good. 18/6 is sweet. 20/4 is a bit much inmop. For cheap lights.
1 Like
If you need help I’m down. Hit me up anytime. The new light. I’m not sure of. I do know the style. MH 3000 is a nice light. A good 4.5x 4.5. They are deals right now. Look around. Everyone is moving up. To cheap HLG Copied lights. They have the same drivers the same lighting board. HLG is very well one of the best lights. But there’s nothing wrong with cheap light either. So I’m come with a 90 day moneyback return you can do a lot 90 days
1 Like
Thanks for the detailed info Barrie, much appreciated! Your info is exactly at my beginner level and that’s rare . I’m not yet familiar with the jargon eh:wink: nor with hardware needed.
About the Cmh, would you recommend a single 630 or dual 315?
Ok on the home box, I’ll try to get it.
For the temps, with the CMH, and the garage going from 10 degrees winter to 25 spring, it should be good then? Leds would mean too cold and humid correct? What are limits on temps and humidity in tent? Thanks a lot!!!
Thanks for popping in Hemp!
Ok on fire ball
Breakers and surge protectors are they the same thing?
So for MH lights, you run 18/6 not 20/4 due to heat, correct?
MH 3000, is it a brand? From HLG? I’ll try to find em but being in Europe, importing = 20-30% taxes and difficult to return in case problem.
I prefer to spend enough and get a good product.
Thanks too Hemp!!!
Glad to be of help!
Yeah in your temp range LEDs without additional heating would be suboptimal.
630w cmh fixtures always consist of 2 315w bulbs AFAIK.
Humidity-wise you want it to be in the 70s during veg and roughly around 50-60% during flower to reduce the risk of mold, that being said, I have also grown plants in higher humidity so it’s not impossible. Temp in the tent should be over 20° and under 30° so you should be fine, possibly it will be necessary to recirculate the air in the colder months instead of venting it out.
Regular MH bulbs are popular for vegging due to the blue light that promotes more compact growth compared to the red-heavy HPS but they are a lot less efficient than HPS or CMH with the same wattage
1 Like