How hot do led's get?

edwardvanhalen123456

edwardvanhalen123456

Well-Known Member
Hey guys, I'm looking into getting a mars hydro II 400.
It's one of the smaller led's but I've seen vids of it and it's really really bright.

I grow with cfl's and they can get pretty hot but I was wondering how hot a good led can get.
Would it be hotter or cooler using an led over cfl's.
 
Airwalker16

Airwalker16

Well-Known Member
edwardvanhalen123456 said:
Hey guys, I'm looking into getting a mars hydro II 400.
It's one of the smaller led's but I've seen vids of it and it's really really bright.

I grow with cfl's and they can get pretty hot but I was wondering how hot a good led can get.
Would it be hotter or cooler using an led over cfl's.
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Man all that advice so many gave you was all for not huh? Why you even ask if you were just going to buy it anyways? Anywho, mars lights GET HOT. The Roleadro I reccomended will run much cooler I'd imagine.
 
edwardvanhalen123456

edwardvanhalen123456

Well-Known Member
Airwalker16 said:
Man all that advice so many gave you was all for not huh? Why you even ask if you were just going to buy it anyways? Anywho, mars lights GET HOT. The Roleadro I reccomended will run much cooler I'd imagine.
Click to expand...
What do you mean about all the advice you gave me meant nothing?
This is a completely different question. I never asked this question before so I don't get why some of you say I post the same things.
Why would I buy a 200 dollar light when I don't even know how hot it will get.

I know some of you guys would give me a good answer. You did give me an answer and now I know that they get hot. You don't have to keep implying that I'm not learning anything.
 
OneHitDone

OneHitDone

Well-Known Member
Just be sure to note that the so called "400W" light actually draws less than 180W and that is the growing power you are going to get
 
insanehq

insanehq

Active Member
mars lights are on the warmer side of leds, but still not as hot as a hps, also a mars400 isnt really really bright at all, better off with a couple of cobs
as they are much brighter than mars and they dont burn out like mars diodes do
 
G

goofy81

Well-Known Member
I don't know about mars, but I measured the surface of my cob at around 100c. Still a lot cooler than a 300-400c 600w hps
 
Z

Zulunature

Well-Known Member
Unfortunately the Mars 2 lights have a design flaw in the lens used over the 450nm or lower led's they have on them.

To much energy is trapped by the lens which become opaque decreasing that spectrum available to the plants and heating up the diode.

Eventually the diode fails due to heat buildup and by then the lens is usually black, so you've been getting nothing from that diode and using power whilst creating even more heat.

When the diode fails it takes out the string thus part of the panel goes blank.

Unless those lens are changed for glass I'd say it's a waste of time to even consider them.

PS. I've grown with these over 2 years ... Worst customer service ever.. and all up very unfortunate experience.

Build your own it's not hard to learn and there many kits available now unlike before.
Or buy one of the lights recommended here that uses COBS and you won't be sorry.
 
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