Mars-Hydro LED Grow Light Discussion

[Mars Hydro]

lol it's not a problem, haha.

hmmmm ok, so if we are planning a new setting for 2019 maybe a good idea to pre-order now

 

[Mars Hydro]

hello taonic, MarsII 700w will cover 1mx1m at the height of 0.6m and 900w will cover 1.2mx1.2m at the height of 0.6m. During flower, the coverage will be less as the hanging distance lower. To cover well 1.2mx1.2m tent, better to go for MarsII 1200w, which will cover 1.4mx1.4m at the height of 0.6m.
More smaller lights will ensure better light distribution. 4pcs MarsII 400w is a good choice, with the coverage of 1.8mx1.8m at the height of 0.6m. 2pcs MarsII 400w only covers 1.8mx0.9m at the height of 0.6m.

Ok so i am going to take the plunge and order some LED's after using HID for many years. I am just wondering what the spread is like on the units, i have 1.2x1.2 tent, would a single larger light, i assume the marsII 700 or 900 watt, cover the space or would it be better to have 2 x 400 watt units per tent? 4 plants to a tent using DWC and scrogging. cheers for any help. Also is it best to order via eBay of direct from the .com site if i'm based in the uk?
Thanks.

 

[Mars Hydro]

thanks for the info.

ok ty

but all tap water have cal/mag .... this is why we have to add cal/mag with purified or distilled water. the "natural" cal/mag in tap water is very very low quality for the plants. so this is clearly better to purifie and add very good quality cal/mag for plants.

so, if your water have some ppm and is not pure ..... you are SURE to have cal/mag in your water, but a bad quality cal/mag. if the leds need a lot of cal/mag like many are saying ..... this "low quality" cal/mag will be clearly not enought.

so, your conclusion that you dont need cal/mag cause your tap water have it ..... is unfortunatly not true.

but, i think me too as you said ..... that iron is the problem ... but its hard to find infos on that topic

 

[Mars Hydro]

yes, MarsII 1600w will cover more area.

for a single area of 16 sqft ..... you need MINIMUM mars2 1200W (525 true watts) .... mars2 1600W is better `(735 true watts).

and yes, light distribution is a big problem for leds panels ..... so this is clearly better to use more smaller panels for 1 big area.

the best option for you is 4X mars2 400W in each corner and the light will be very good everywhere. only 1X 1600W will not cover correctly the edges of your area.

mars2 700W or 900W for 4X4 are good for growing letuce .... not marijuana.

 

[Mars Hydro]

haha, our website offers three years warranty for the moment.

Hey Taonic

I use a M2 900 in an area roughly 1mx1m and its seems to be doing well for flowering. The 900 would be good for vegging in your tend but I would recommend going with a 1200 if you intend to flower in it. And order from the Mars-Hydro site if you want a better warranty, the ones on ebay only have a 1 yr warranty.

 

[Mars Hydro]

hello supergroomer!

I agree. My 900 is perfect in my 1mx1m tent. I would do a 1200 for for your larger space.

 

[Mars Hydro]

they are better. when there are more stock, we will choose the tester.

I can't wait for the tests on the new lights. Don't get me wrong. I am VERY happy with my Mars II lights. But it can only get better right?

 

[Mars Hydro]

Congrats on more seeds, flexy.

That's a good thing because it means adding Cal/Mag should be ok, even with tap water.

Our "Seed Guy" delivered stuff today, so I am just waiting for the pots to dry so I can water with CalMag added to see how it goes. Also got two more seeds and one bonus seed...and finally GOOD soil (Canna Terra).

 

[Mars Hydro]

thank you very much for the help, flexy.

I am not too experienced (yet) so I can't give advice on the right strength of the LED you will need, but in my opinion several SMALLER ones would be better than a large one. More flexibility especially if you wouldn't be able to dim the large light. You have more freedom to position the lights and also have the option to turn one off should two for some reason be too strong.

Edit: Assuming you mean 1.2m, according to MH website and the Mars 2 info, a 900W covers 4x4 (since 1.2m = 3.93ft) and POSSIBLY even a 700W might work but it might get "tight". Instead of a 700W I would get 2x400W. But take all this with a grain of salt, that's just my calculations looking at the specs.

 

[Mars Hydro]

30 to 50 watts of actual power per square foot during bloom will propably increase the yield and grow thick and dense nuggets.

I use a larger light at one height and move the pots up and down to even the canopy. 2 400s would not be enough light for flower. You would probably be ok for veg, but 180w x2=360w that is 22w /sqft. I would used at least a 1200 (35w /sqft) or a 1600 (48w /sqft) These would bring out the full potential of your plants. You want 35-50 w/sqft.

 

[randy355]

Took a little time from harvest to remind everyone
DO NOT SMOKE A BUD LARGER THAN YOUR HEAD!!
This was grown under, into, around, and over a 900 watt Mars 2, Resin rich and sticky sweet

 

[Mars Hydro]

The penetration will be the same. As for the power consumption, LED will help you to save more from ballast, ventilation and A/C, etc than HPS, although the power consumption of light itself will be close. We are working on testing the BTU of our lights. As long as the data comes out, I will tell you guys at the first time.

Ok.....Thanks for the input, it has given me something to think about. So i am assuming that 4 x 400 would be preferable to one 1600, purely from a control point of view, it gives you more options and that would equal one 400 per plant. But would this set up give the same penetration due to the spacing between the units as opposed to the grouping of the single unit?? I like the idea of having a backup should one pack up however it starts to detract from the draw of cheaper running costs when the power consumption will differ only slightly from an HPS set up. What kind of heat would 4 x 400's or a 1600 give out compared to a 600 hps running through a cool hood? sorry i'm sure that this has all been spoken about before but the 1050 pages to the thread are a bit of a minefield although it also tells me that this is a product that is worth talking about, thanks again in advance for any response

thank you.

I have never grown with HPS so I cannot compare that. What I can tell you is this. I have one tent with 2 400s (veg) and one with 1 900 (flower). I run one 440cmf fan split between the 2 tents. My 900 runs about 1-2 degrees cooler then my 2 400s. I try to have my tents dialed in at 85 degrees. My veg tent is about 86 and my flower 84.

Like I said, I raise and lower my pots not my light in the flower tent. I use 6x6 tiles that I have a box of. I stack them under the pots to raise them to the height I want.

 

[Mars Hydro]

hello taonic, if 1.2mx1.2m is not the real grow space, MarsII 1200w will be enough.

Thanks for the response, How many plants do you have in the flower tent at a time under a 900? Although i have the 1.2m tent i only have 4 plants in that area so that i have some working room so I'm not sure if 1600w in either multiple units or the single would be overkill or whether it's a case of throw as much power at them as you can? cheers for the input.

 

[Mars Hydro]

great work.

Darned good question, and you'll get a lot of contradictory answers.

I ran a 600W hps for a year, and then switched to a 540W LED. The drop in temp was dramatic! My room has very little ventilation with a 4 inch flue at 50CFM, and the hps raised temps 8 degrees while the LED panel only raised it 2 degrees.

I didn't have a hood, though, so I trapped a lot more heat from the hps than you do, and that's where the differences in the answers come from. In your case, the hood will exhaust much better than an LED panel, so you won't see as much difference. You can probably go to 800 watts draw power in LEDs and have similar heating issues as your 600W hps. I'm currently getting away with 1000 watts of LED in my 4x4 with the feeble ventilation.

 

[Mars Hydro]

Well said, flexy, the beam angle is 90/120. It also allows you to minimize low light areas by having the ability to move individual lights around as needed in order to minimize light gaps or dark/shaded areas, haha. Hope this explanation will be better to understand.

I don't think it will make any significant difference whether you use two smaller units close together or one larger unit. Plus, you can always set separate lights at a slight angle and sort-of focus them at one point if you really *think* that penetration would be an issue. We're talking a few inches more space between units here, I don't think it matters due to the distances the lamps will be at and the fact that the lights spread 90 or 120 deg. downwards anyway.

 

[Mars Hydro]

well done.

Right at the moment, I have 3. Last round I had 4 well trimmed plants of different strains. 1 Blue Blood, 1 White Widow, 1 Critical Super Silver Haze and 1 Blue Berry and I ended with about 15 oz.

 

[Mars Hydro]

haha, I love your grow, ganjazz.

Looking for tester , im volunteer

In 3 weeks place 6 auto's under led.

 

[Mars Hydro]

the draw power for 144x3w is 250~300w and that of 144x5w is 300~320w.

Can someone tell me the difference in draw wattage of the 144x3 compared to the 144x5? Kinda curious

 

[Mars Hydro]

Mars Pro has two models, Epistar and Cree LED.
Epistar LED has Epistar320LED and Epistar160LED. The draw power of Epistar 320LED is 720~750watt and that of Epistar 160LED is 360~390watt.
Cree LED has CREE128LED and CREE256LED. The draw power of CREE128LED is 320~350watt and that of CREE256LED is 640~660watt.

>>
we are still looking for tester for our new light.
>>

what wattages are those new lamps available at?

 

[Mars Hydro]

Hi Brainzfuxed, the recommend height is 24~30inch during Germination, 18~24inch during Vegitative and 12~18inch during Flowering.

How high above my seedlings should I hang my 96x3 reflector. What about during veg stage and in flower? Thanks

Reason I'm asking is leaves were starting to curl and get crispy thanks