Once and for all.. L.E.D or H.I.D ??!

ttystikk said:

Adding a UVB source is potentially a good idea. BE SAFE; turn the lamp off of you'll be near it for any length of time, NEVER go near it or even look at it without eye protection. Macular degeneration sucks.

CMH is not a good UV source, nor is any other HID besides mercury vapor. Use UV tuned florescent instead.

Be careful to harden your plants off to it gently or you will fry them.

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Any idea on how much W per sqr meter (or foot) is appropriate?. The eye protection was hard in place for the cob/cmh o0. Sometimes I still fuck up and look up directly into a co, It's like working around welders for the industry folk ;p.

Flowki said:

Any idea on how much W per sqr meter (or foot) is appropriate?. The eye protection was hard in place for the cob/cmh o0. Sometimes I still fuck up and look up directly into a co, It's like working around welders for the industry folk ;p.

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Watts per square meter the wrong unit. Use a direct measurement of UV light.

Tubes exist that emit anywhere from 5% to 20% and even up to 80% or more of UV so act accordingly.

The best results come from plants that get UV even in veg, which hardens them off and prevents damage later.

Got welder flash from old cmh, glasses without side guards. Slightly to the rear of the bulb seemed to be the hot spot.

ttystikk said:

Watts per square meter the wrong unit. Use a direct measurement of UV light.

Tubes exist that emit anywhere from 5% to 20% and even up to 80% or more of UV so act accordingly.

The best results come from plants that get UV even in veg, which hardens them off and prevents damage later.

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Do you have a decent link for more specifics on using UV?. I would appreciate that as I'd unlikely know what bs info is or not.

Oh I forgot. I little while ago a guy posted his results with UV, I didn't doubt his positive results, but I did question something. If you are using say 300w of UV and it has X/Y effect, would you not be closely served by swapping that 300w out for say cmh instead?. Maybe it depends entirely on the goal?.

ttystikk said:

Then you have other criteria than reducing energy use in your grow space.

Not bashing, just pointing it out.

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But you said led weed is better again. And i have no excuse to not “upgrade”.

Just pokin’ fun.

When the leds get to a real 50% efficiency over hps i will have to consider the yield vs heat difference at least.


Only problem is real university agriculture testing is being done on discreet colored diodes.

The future of led is still mostly blurple. Only a few “white” diodes are needed apparently.

Have you seen this new Amare 8 bar the guy here is testing. Looks pretty damn sweet! Seems like it's got a nice mix of white and colored diodes. And I think it's a true 800watt led super evenly spread over a 5x5 area. I'm really interested to see how it works out.

Thundercat said:

Have you seen this new Amare 8 bar the guy here is testing. Looks pretty damn sweet! Seems like it's got a nice mix of white and colored diodes. And I think it's a true 800watt led super evenly spread over a 5x5 area. I'm really interested to see how it works out.

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The tech is starting to show. They are admitting the shortcomings of full spectrum diodes and adding needed colors. I always look at all the new stuff.

Michigan state university is adding just a little white to specific red, blue and green ratios. Other colors are in testing too.

I think in 5 years led will be plant specific like fertilizer.

MichiganMedGrower said:

The tech is starting to show. They are admitting the shortcomings of full spectrum diodes and adding needed colors. I always look at all the new stuff.

Michigan state university is adding just a little white to specific red, blue and green ratios. Other colors are in testing too.

I think in 5 years led will be plant specific like fertilizer.

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A complete kit, pre-flowered plant and all. lol

NoWaistedSpace said:

A complete kit, pre-flowered plant and all. lol

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According to all the complete grow box manufacturers it already is.

Flowki said:

Do you have a decent link for more specifics on using UV?. I would appreciate that as I'd unlikely know what bs info is or not.

Oh I forgot. I little while ago a guy posted his results with UV, I didn't doubt his positive results, but I did question something. If you are using say 300w of UV and it has X/Y effect, would you not be closely served by swapping that 300w out for say cmh instead?. Maybe it depends entirely on the goal?.

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CMH doesn't emit enough UV to make any difference. Again, X Watts isn't the right unit of measure; you need to divide by the amount of UV emitted by the lamp in question. I don't have any numbers memorized. Be sure to boost UVB; UVA isn't as effective and UVC is too damaging.

MichiganMedGrower said:

But you said led weed is better again.

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No offence, but when someone really keeps saying that you know they are top 5 stupidest motherfuckers on the planet. Also the fact that Cardi B is not the halftime show should piss off most people.

MichiganMedGrower said:

But you said led weed is better again. And i have no excuse to not “upgrade”.

Just pokin’ fun.

When the leds get to a real 50% efficiency over hps i will have to consider the yield vs heat difference at least.


Only problem is real university agriculture testing is being done on discreet colored diodes.

The future of led is still mostly blurple. Only a few “white” diodes are needed apparently.

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My personal experience isn't exhaustive but my best results have come from full spectrum LED chips at 3000K to 3500K.

Slow down your ventilation fan to raise temperature under LED and continue to pull the excess through your home for heating. It should serve both purposes well.

a mongo frog said:

No offence, but when someone really keeps saying that you know they are top 5 stupidest motherfuckers on the planet. Also the fact that Cardi B is not the halftime show should piss off most people.

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Who is Cardi B and why should I waste my time watching the game?

a mongo frog said:

Also the fact that Cardi B is not the halftime show should piss off most people.

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Moron 5 will be so much better

i was hoping for Caitlyn Jenner to do a sultry strip tease for halftime

remember the good ole days when they had the lingerie bowl during halftime?

MichiganMedGrower said:

The tech is starting to show. They are admitting the shortcomings of full spectrum diodes and adding needed colors. I always look at all the new stuff.

I think in 5 years led will be plant specific like fertilizer.

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For someone who always looks at the new stuff that last statement is odd because it sounds about 10 years old. Led light recipes specifcally for different varieties and production stages are barely new anymore.

ttystikk said:

Who is Cardi B and why should I waste my time watching the game?

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Just some fake ass Nicki Minaj clone wannabe.

ttystikk said:

Who is Cardi B and why should I waste my time watching the game?

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You better watch this fucking game dude....

a mongo frog said:

You better watch this fucking game dude....

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No.

Not one damned minute before Colin Kaepernick gets signed.

And probably not even then.

They used to actually play football. I don't know WTF they're doing anymore and their politics suck. They did the same thing to NASCAR.

ttystikk said:

No.

Not one damned minute before Colin Kaepernick gets signed.

And probably not even then.

They used to actually play football. I don't know WTF they're doing anymore and their politics suck. They did the same thing to NASCAR.

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Its going to be a great game. Watch the fucking game. Kaepernick hasn't played in 3 years. No team can take a chance on him. Who is he better then right now?

a mongo frog said:

Its going to be a great game. Watch the fucking game. Kaepernick hasn't played in 3 years. No team can take a chance on him. Who is he better then right now?

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3pt spread. should be close. vegas isn't wrong often or the lights would be off.

and yeah, if Kaep was decent, he'd be at least a backup now. he's better than paxton lynch for sure. and elway drafted him pretty high

ttystikk said:

My personal experience isn't exhaustive but my best results have come from full spectrum LED chips at 3000K to 3500K.

Slow down your ventilation fan to raise temperature under LED and continue to pull the excess through your home for heating. It should severe both purposes well.

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I am already maxed (minimumed) out on that. I usually add another lamp about now. Or run the hoods open and reroute the exhaust.

I figure if i could equal wattage with led and keep to my 18” over the canopy minimum canopy distance (or less) i could manage the heat like you suggest. And increase yield without decreasing quality hopefully.

But now we are talking some money and i only really needed ballasts to keep going like i am. I am considering them for a 4x8 shorty tent i got for my basement. I will buy over time for the tent as i need to insulate the basement some first. Its about 40 down there right now. Open basement side of hill.