Mars-Hydro LED Grow Light Discussion

Dopey Bob said:
Yeah Sara said the 144 was in stock in 5w but I didn't ask about the smaller panels so am I sure she will pop by to confirm. Luckily I measured before ordering the 144 as that would have been a real pain.

I could fit a 700 mars in that space but I'm concerned with that headroom it could be overkill. But from what I have read in this thread it's advised 50w per square foot. Basing that on actual wattage the 700 is about 300ish watt output right? So my space is roughly 2ftx3ft which would make 50w per sft. I appreciate that's approximate.
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My first grow space was a 2x3x5' closet. I put a 400 in there and it did great.:peace:
 
hi everyone
i have a lovely space that is quite long .. but its only 92 cm wide .. so reasonably narrow.

Would it be appropriate to mount a 144x3 in that space - but with the long side of the Mars (83.8 cm) straddling or bridging the space between both walls.
92cm wide - 83.8 ..... that leaves just 8.2cm total lee-way.
If the Mars is perfectly centred, its 4.1cm wall clearance on both sides.

Is being that close to the wall a hazard for both general safety, and problems due to likely excessive heat transfer ?
(Assuming all other variables are controlled .. ventilation is good; not using meltable panda plastic, or anything similarly likely to melt/combust etc )
Its the smaller face of the mars that would be facing the wall - so a 10.4 x 2 inches cross section.

In the (HPS) past I've paid only a passing heed to the idea of using reflective surfaces, and somehow still managed to have some great results. I'm hankering to utilize some up-close & solid reflective surfaces to help with my next grow (my first one under led) but this particular suggested equipment orientation may be too close.
 
yes, dopey ... you have 4.7 sqft and mars2 400W maybe little short for that, cause full power is 4 sqft. that why i suggest going for 2X 300W (60X5) old model or 2X 240W(48X5) reflector, cause the 2 can cover around 2.3 or 2.4 sqft each for full power ..... and 2 of them is perfect for 4.7 sqft ...... old model 600W (120X5) maybe a good choice too.

mars2 700W is effectivly little bit overkill for 4.7 sqft. but you can go for it if you have enought money ..... and put little more high than normal.

more is better than less for sure, but as supergroomer said, many have very good results with less than full power.

happy growing
 
hello,

to cover 92cm wide you need 96X5 reflector and it will be ok .... 144X3 is too much for nothing and this is better to go for the new reflector with 5W chips instead of 3W. each 48X5 reflector can cover around 45X45cm for full power light, so 92cm is perfect for 2.

forget about old reflector and go for the new one with 5W chips ... cause old one only cover 40X40cm each 48X3

happy growing

pastafarian said:
hi everyone
i have a lovely space that is quite long .. but its only 92 cm wide .. so reasonably narrow.

Would it be appropriate to mount a 144x3 in that space - but with the long side of the Mars (83.8 cm) straddling or bridging the space between both walls.
92cm wide - 83.8 ..... that leaves just 8.2cm total lee-way.
If the Mars is perfectly centred, its 4.1cm wall clearance on both sides.

Is being that close to the wall a hazard for both general safety, and problems due to likely excessive heat transfer ?
(Assuming all other variables are positive .. ventilation is good; not using meltable panda plastic, or anything similarly likely to combust etc )

In the (HPS) past I've paid only a cursory heed to the idea of using reflective surfaces, and somehow still managed to have some magnificent results. I'm hankering to utilize up-close & solid reflective surfaces to help with my next grow (my first one under led) but this suggested orientation may be too close.
Click to expand...
 
Dopey Bob said:
Hi Mike,

Thanks for stepping in to help. I've gone and measured up and thankfully I did as I would be too short at for the 144x5.

Fairly close measurements to be safe and give a little bit of elbow room would be 53 x 82 x 180 cm interior space.

Yep, I have the fan controllers :)
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I grow in wardrobe also, 60 x 90 x 200

Using mars2 700w + reflector 96 x3w

Would go for the 144 x 5w, or mars2 700/900w (no need to upgrade than later :) )

pics:
SAM_3365.JPG
SAM_3367.JPG
 
DarkSidofMike said:
hello,

to cover 92cm wide you need 96X5 reflector and it will be ok .... 144X3 is too much for nothing and this is better to go for the new reflector with 5W chips instead of 3W. each 48X5 reflector can cover around 45X45cm for full power light, so 92cm is perfect for 2.

forget about old reflector and go for the new one with 5W chips ... cause old one only cover 40X40cm each 48X3

happy growing
Click to expand...

hi Mike
thanks for the input matching appropriate light for the space. But i am asking a question about the closest safe mounting distance from a wall, and the associated heat transference issues. How close is too close ?
Its possibly one for the wardrobe growers i think, as tent growers are dealing with different set of materials/fabric/enclosure.
 
pastafarian said:
hi Mike
thanks for the input matching appropriate light for the space. But i am asking a question about the closest safe mounting distance from a wall, and the associated heat transference issues. How close is too close ?
Its possibly one for the wardrobe growers i think, as tent growers are dealing with different set of materials/fabric/enclosure.
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mars2, reflector don't get hot,and dont produce alot heat.

putting close to wall isnt problem, aslong as air outake other sides are open

my reflector is 56cm while cabinet depth is 57(3cm isolation) so it just fits, and no heat issue,(air outtake 2 sides is sufficient)
 
Hi all,

I'm looking to replace my air cooled 1000w hps for my 4x4 flower tent.

I generally never do any kind of scrog, only lst if i have a stretchy sativa. I am considering either the 1600w Mars II or two 900w Mars II. I just picked up two of the 'Old New' 300w Mars II for my veg tent and am very impressed, I love how much cooler they run, this is why I wish to replace my HPS. I am sick of that battle entirely. I have more than adequate ventilation which keeps my temps max 7degrees over ambient 18" from the light @600w, 8 @1000w.

My tent is just shy of 7' in height.

Which would be my better option for penetration for taller plants? How close can I safely keep the lights from the canopy during flower?
 
hello Raoul

mars2 1600W is perfect for 4X4 and to replace a 1000W HPS and get full light power. 2 panels or more is always better for light distribution, so yes 2X 900W will be better. the perfect setting would be to have 4X mars2 400W one in each corner.

mars2 are the best for penetration in marshydro products, so you are ok. 5 foots tall plants are not a problem.

for vegging, keep the light 18 to 24 inchs over the canopy ... for flowering keep it 12 to 18 inchs over the canopy, 12-15 max to have full power.

happy growing
 
DarkSidofMike said:
hello Raoul

mars2 1600W is perfect for 4X4 and to replace a 1000W HPS and get full light power. 2 panels or more is always better for light distribution, so yes 2X 900W will be better. the perfect setting would be to have 4X mars2 400W one in each corner.

mars2 are the best for penetration in marshydro products, so you are ok. 5 foots tall plants are not a problem.

for vegging, keep the light 18 to 24 inchs over the canopy ... for flowering keep it 12 to 18 inchs over the canopy, 12-15 max to have full power.

happy growing
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I thought about that but am worried about how much weight my tent can support.

4x400 puts me at 28kg
2x900 puts me at 24kg
1x1600 puts me at 14.7kg

I have the mars 4x4 tent, it currently has to support a 9kg filter and 6kg fan.
 
SmokeSara said:
:circle-of-love:hi maccamoo, the draw power of MarsII 1200w is tested 548.2w under 240V. eh... how come it's so much short.
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Well I was hoping you can let me no why my lights not pulling anywhere near the wattage it should be. Obviously if it's not pulling enough watts then the leds can't be running at optimum leval. I wouldn't mind if it was 10-20 or even 50 watts less but this is drawing 399watts from the wall and it should be near 560wats. Over 150 watts short. I need this looking into please at your end. I don't no why the panels not pulling the right power but I'm sure my gardens will be affected. See if I wanted to use 399watts of power I'd half my room size and buy your 700 or 900watt light but I paid for the 1200 mars 2 as that's what I need for my room. Please look into this for me and see what can be done
 
pastafarian said:
hi everyone
i have a lovely space that is quite long .. but its only 92 cm wide .. so reasonably narrow.

Would it be appropriate to mount a 144x3 in that space - but with the long side of the Mars (83.8 cm) straddling or bridging the space between both walls.
92cm wide - 83.8 ..... that leaves just 8.2cm total lee-way.
If the Mars is perfectly centred, its 4.1cm wall clearance on both sides.

Is being that close to the wall a hazard for both general safety, and problems due to likely excessive heat transfer ?
(Assuming all other variables are controlled .. ventilation is good; not using meltable panda plastic, or anything similarly likely to melt/combust etc )
Its the smaller face of the mars that would be facing the wall - so a 10.4 x 2 inches cross section.

In the (HPS) past I've paid only a passing heed to the idea of using reflective surfaces, and somehow still managed to have some great results. I'm hankering to utilize some up-close & solid reflective surfaces to help with my next grow (my first one under led) but this particular suggested equipment orientation may be too close.
Click to expand...

Hey man good to see another antipodean.. just had to say g'day and I love your avatar. We mite be at odds though cos I'm a devout pizzacostal......
 
:welcome: thanks for dropping by, Dopey, the dimension of MarsII 400w is 340x340x60mm and that of Reflector 144x5w is 837x264x50mm. Better to measure the area first and choose the right one. :circle-of-love:
Dopey Bob said:
Hi Sara,

We have spoken over my email recently so I have come and joined 420 rather than just lurk in the background. My old HPS ballast has given up and died so after all I have read and the growing space I have I want to go over to LED. Could you and the other experienced led growers give me some advice please?

My set up is - a standard size wardrobe as it's more covert than a tent. Fully reflective interior. I have an intake fan, 6" interior rotational fan for air movement and a rhino carbon filter/fan for extraction. I only grow max 2 plants but they are often a good size. I grow in coco.

My question is - do I buy a Mars hydro II 400w for veg now and buy a second 400 so I have one over each plant in flower? OR

Do I but the 144x5 reflector now which will run the whole length of my narrow grow space?

Plants are main lined, topped and trained to grow bushy and narrow within my grow space.

Any advice on the above is much appreciated Sara and all. :Namaste:
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:Namaste:I guess the Olde Model 300w is 100x3w.:cheesygrinsmiley:
DarkSidofMike said:
we need to know your space area and dimensions to give you advices dopey :)

im growing in my wardrobe me too and i have 2 differents area in the same wardrobe .... 58cmX85cm and using 2 panels old model 300W for veg and flowering ..... and another area of 58cmX58cm and using 1 panel mars2 400W for veg and flowering ... no official intake for both and only 1 or 2 90cfm 120mm pc fan each as extractor .... having amazing results with mars hydro

you will need a speed controller for your extractor, cause you will need to step it down if you was using HPS before in that area ... LEDs produce very low heat

so give us your area dimensions ..... and will help you
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Hmm... reflector 144x5w is hard to squeeze in the, 1pcs MarsII 400w is OK but 2pcs MarsII 400w are a little wider. :Namaste:
Dopey Bob said:
Hi Mike,

Thanks for stepping in to help. I've gone and measured up and thankfully I did as I would be too short at for the 144x5.

Fairly close measurements to be safe and give a little bit of elbow room would be 53 x 82 x 180 cm interior space.

Yep, I have the fan controllers :)
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The dimension of Reflector 48x3w is 294x262x50cm. 2pcs Reflector 48x3w is 1pcs Reflector 96x5w. Both of them will fit in.:circle-of-love:
DarkSidofMike said:
ok ... so i think your best options are .... 2 pcs of "new" old model 300W (60X5) will be very good for that area, and for real cheap .... 1 pcs 96X5 new reflector (not the old 96X3) will be very nice too, but for little more money (or 2 pcs 48X5 reflector) .... and finally 1 pcs mars2 400W will be good too, for little more money again.

my best choice are .... 2 old models 300W for the very good price and nice light distribution with 2 panels .... or 2 reflectors 48X5 for better quality panels and very nice light distribution too with 2 panels

happy growing
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Reflector with 5w leds are available in Europe. In US, except Reflector 48x3w, the other Reflector models are all with 5w leds. :circle-of-love: MarsII 400w can cover the area of 90cmx90cm at the height of 60cm. It's enough for the veg. When they grow up, you can add other panels to supplement the light.:Namaste:
Dopey Bob said:
I am leaning towards the 400 mars II. I can easily control the heat now I am stepping down from HPS.
On the mars hydro website it is only given the 144 as 5w not the 96. So I would need confirmation I can get that panel in 5w but it would give a good spread of light.

My current thinking is perhaps the 400 and that would still leave me enough room to add another panel of some kind if I wanted to add more light. Again I am open to feedback
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UFO 180w will be a good idea.:thumb:
DarkSidofMike said:
yes, maybe you can add a little UFO 180W later, if you think you need more light

you will love marshydro LEDs no doubts ... HPS are from another age

:)
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Hey I've been lurking around here the last few weeks gathering information and I'm still having issues making my final decision between 2 Mars2 400w units or 1 single 5X144 reflector unit.

So I figure 2 Mars2 400w lights would likely run hotter then one 5X144 reflector, it would also cost more and have less coverage but have better penetration which may result in better yields/quality.

For my 4X2 foot space with minimal ventilation growing plants no taller then around 3 feet do you think it would be a good idea to go with 2 Mars2 400w lights for the extra penetration or would it be better to go with the cheaper and more cool operating 144X5 watt reflector that has better coverage?

To sum up my question: Will the 2 Mars2 400w Units increase my yields/quality enough while not requiring additional ventilation to deal with the heat to be worth spending the extra 100$?


Also on a side note have you ever considered adding a UVB spectrum diode to your lights as I've read it has the possibility to increase THC percentage and I see other LED manufacturers adding UVB diodes into their lights.

Thanks in advanced for any help.
 
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