Mars-Hydro LED Grow Light Discussion

Hello Razie, :welcome:

We do not have that information, we only have lumens information.
raziel819 said:
Good morning/Good evening.... just Hi Sara, :;):

I have a question that I have not been able to find an answer to myself. The Question is, what is the Par rating of the Mars II 700w at 50cm, 80cm, 100cm and 150cm?

Thanks,
Raziel819
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CoNerd said:
I can't move my lights further away as I'm growing in a small tent. As it is, I had to make brackets for my lights to gain the 16" of hanger space required by the stock cables. Currently, most growers are using completely flat lighting, all sitting in one plane, putting out maximal light with an unchanging spectrum throughout the photo period. I believe there's massive potential gains to be had by using photons more intelligently.

Using the existing $30 controllers, protocols and electronics (cheap enough to go in a $25, 3 color LED bulb) may make it practical for MH to add useful features to their products without having to do a lot of custom R&D. My parents didn't see the point of spending money on a TV remote, either. Until their new TV came with one. I still remember my dad asking the sales guy if he could get the TV cheaper without the remote control because he didn't need it. He told the guy; "That's what kids are for." :)
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Ok, apologies for my naivety. I see how it would be useful for you to have a remote to adjust the power of your lights.

CoNerd said:
What was your yield per square meter? I'm also interested in how many watts (true) of LED lighting per square m you are using in your tents. It looks like you had a very successful grow using these lights.

:thanks:
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Thanks CoNerd. I have two 1.2mx1.2m tents. One of them produced a little over 12oz (I call this F#1). The other produced a little over 17oz (F#2).

So it's around 15oz per metre squared I'd say going by F#2. And i learnt a few things this time around so i'm sure I can get more next time around.

The light in the first (F#1) is the Mars 1200w (which draws a maximum of 600w), so this came out around 0.55g per watt. This was mainly because there were too many plants in this tent and because I didnt control the canopy well enough so they were all different sizes which made everything infinitely more difficult.

The other has 4 x Mars II 400w, which draw around 170w each (4 x 170 = 680). Here i got 482g so this works out to 0.71g per watt. This tent was scrogged in Veg which levelled off the canopy nicely for flowering. On reflection, I should have swapped lights and had the large one in the scrogged tent, and the 4 ligths in the other where i could have adjusted them to cater for the uneven canopy. But i know now for next time.


I think I could push this to 0.8g per watt next time around.

You're welcome to check out my journal for more information

:peace:
 
CoNerd said:
Fire departments really do not like to see daisy chained power. It's too easy to overload power cords and connectors by daisy chaining.

You have to make sure the lead light has heavy enough gauge conductors to power all chained lights. Lights would have 12Ga cords and a breaker/fuse for the AC chain socket. 18ga power cords are much cheaper and easier to manage.
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Before I ordered my lights, Sara checked with her engineers about how many Mars 2 400's I could daisy chain. I think she said 8. I recall thinking it was just within a 15A@120V circuit. I only daisy chain 4 lights at a time, so I'm well within the specs of the equipment.

I appreciate the warning though. You should ALWAYS be sure about what you're doing with electrical. :)

SmokeSara said:
Actually I talked with factory about the removable lens, they said it will be damaged easily during shipping ,so we can not use that one.
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Don't the Mars2 use a glass cover? None of mine broke in shipping. :)

GoogleGenie said:
Also would it be possible for the 4 brass hanger attachments on the back to be placed in the corners instead of in the middle, this would mean being able to hang the light square instead of in a diamond.
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huh? :scratchinghead:

How the light hangs depends on how you hang it, no? If it's rotated from where you want it, can't you move your anchors?

I thought I had a pic, but I was wrong. I use the carabiner attached to all 4 of the cables, then my support rope is attached to that. Each light is hung from one point in the center. I connected the cables a little different so they did not have to hand so low. That's the picture I thought I had. I don't understand how the location of these anchors forces you to hang your light a certain way.

GoogleGenie said:
Personally, I don't see the point of making them dimable or remote controllable, just more stuff that can go wrong. The more light the better IMO and if you want to decrease the intensity for some reason you can always move the light further away.
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There is some interest in trying to simulate a more realistic day time pattern by changing the spectrum and intensities during each daily cycle. This isn't just a single adjustment. Some folks want to have this controlled through automation. :)

GoogleGenie said:
Thanks CoNerd. I have two 1.2mx1.2m tents. One of them produced a little over 12oz (I call this F#1). The other produced a little over 17oz (F#2).

So it's around 15oz per metre squared I'd say going by F#2. And i learnt a few things this time around so i'm sure I can get more next time around.

The light in the first (F#1) is the Mars 1200w (which draws a maximum of 600w), so this came out around 0.55g per watt. This was mainly because there were too many plants in this tent and because I didnt control the canopy well enough so they were all different sizes which made everything infinitely more difficult.

The other has 4 x Mars II 400w, which draw around 170w each (4 x 170 = 680). Here i got 482g so this works out to 0.71g per watt. This tent was scrogged in Veg which levelled off the canopy nicely for flowering. On reflection, I should have swapped lights and had the large one in the scrogged tent, and the 4 ligths in the other where i could have adjusted them to cater for the uneven canopy. But i know now for next time.


I think I could push this to 0.8g per watt next time around.

You're welcome to check out my journal for more information

:peace:
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Thanks for sharing the numbers. I'm not sure I've seen any other gpw #s for Mars 2 lights.

I think there is a math error. 1.2m x 1.2m x 2 = 2.88 m2
29oz / 2.88 m2 = 10.07 oz/m2 or 0.94 oz/ft2
an ounce a ft2 is very respectable. :bravo:

The gpw #s seem low at first, but I'm not sure I've seen gpw for these lights before.
I've not finished a batch entirely under the Mars II yet, so I think I got worried trying to compare these to the HPS #'s I'm used to.

I'll have to go check out your journal to fully understand I guess. :blalol:
 
low? what do you yield? I was able to get 50-60 grams from two plants under a 150 watt hps which is about .37 grams per watt. I think that's pretty good?
 
I love my Top Leds and I am a real person...:yahoo:....:circle-of-love:
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b.real said:
low? what do you yield? I was able to get 50-60 grams from two plants under a 150 watt hps which is about .37 grams per watt. I think that's pretty good?
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I was able to hit 1 gpw with HPS. Nice round number :)

My post where I broke the 1 gpw threshold.

I'm hoping to do at least that well with the LEDs. I will be disappointed if I don't. Based on my test run with a reflector light, I should be fine. Looking at the crop, I think I should be close at least. It could take 2 grows with the lights to dial in everything else to the new lighting.

:Namaste:
 
Dennise said:
I love my Top Leds and I am a real person...:yahoo:....:circle-of-love:
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Dennise those plants are beautiful!! :)

I have one suggestion though, where one of your plants is quite tall in the picture above, I would recommend you get some ratchet hangers (you get 2 in a pack) they cost around $10 and attach them directly to the brass connector on your Mars II. That way, you can adjust the angle of your light to around 35-40degrees so that it is facing slightly more toward your larger plant, but so that the lower plants are getting light too because of the 120degree lens' on the LEDs.

Ok, 2 suggestions ;)...the PAR value of light reflected off of the reflective material in your tent will be far less than direct light from your light so all that light coming off of the right could be put to better use by tilting it slightly anyway (you are paying for the electric after all ;)). Its hard to describe the positioning of the light so if you are interested let me know and i'll send you a picture of what I mean using my Mars II 400.

Don't be scared to tilt the light either, as long as it is secure it should function just fine at that angle.

Other than that, I hope you are well, your plants certainly are ;)
 
I have several mars hydro 2 lights, The way I hang my lights is take cable off the connector and put a piece of light weight chain on each connector, so you have 4 pieces of chain 4 foot long, I have 4 eyehooks in my frame, with chain ran to them. Now my light can be adjusted in half inch increments, raise or lower hook chain on eyehook and if you need to tilt a light raise or lower one side easily.
 
GoogleGenie said:
Dennise those plants are beautiful!! :)

I have one suggestion though, where one of your plants is quite tall in the picture above, I would recommend you get some ratchet hangers (you get 2 in a pack) they cost around $10 and attach them directly to the brass connector on your Mars II. That way, you can adjust the angle of your light to around 35-40degrees so that it is facing slightly more toward your larger plant, but so that the lower plants are getting light too because of the 120degree lens' on the LEDs.

Ok, 2 suggestions ;)...the PAR value of light reflected off of the reflective material in your tent will be far less than direct light from your light so all that light coming off of the right could be put to better use by tilting it slightly anyway (you are paying for the electric after all ;)). Its hard to describe the positioning of the light so if you are interested let me know and i'll send you a picture of what I mean using my Mars II 400.

Don't be scared to tilt the light either, as long as it is secure it should function just fine at that angle.

Other than that, I hope you are well, your plants certainly are ;)
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if im not mistaken, it looks like there is another light above that mars light we see in the pic. there is some bright purple above that i believe is from another light.

I&i
 
Gfcollective said:
if im not mistaken, it looks like there is another light above that mars light we see in the pic. there is some bright purple above that i believe is from another light.

I&i
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Ah, right you are......well.....that was quite a waste of time typing up hahaha!!
 
GoogleGenie said:
Ah, right you are......well.....that was quite a waste of time typing up hahaha!!
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its a good post for any who has that issue. i did this myself just recently, then i decided to throw a 5G bucket under the ladys because 2 of my 6 strains are just short bushy lovely looking ladys ;)

I&i
 
Densenug said:
Dennise your plants look really good, learned a few things from your grow but still have a ways to go.
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I'm so glad I could be of some help... If there is ever anything I can answer for you please feel free to pop over to my journal in my signature and if I can't answer you I am sure some of the people that pop through there will be able to.....:circle-of-love:
 
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