MH vs HPS in bloom

[shizznit]

1000w Commercial Grade Lamps

Commercial grade lamps come in 1000w only.

Superior Photochemical Reactions

Proper UV balance

Advanced HID lamp design

Lamps made by life scientists for plants

Best sunlight replication

Designed for commercial applications

Made for quality, consistency and yield



This series of lamps come in 3 different Kelvin colors:

2.8K - For fruiting and flowering

5.7K - Brilliant Full Spectrum light

10K - For Ripening and Finishing




SunPulse® Lamps all contain UVA - UVB and the upper portion of UVC
Exercise caution when working around any HID lamp that contains UV. Always wear protective lenses.

 

[!PeAcE!]

good stuff, indeed we only life once and so do your plants...so show them a good time! brew them some drinks, give them full spectrum, but the sun if you can help it and they will remember you.

 

[the gnome]

thanks for posting those shizznit

 

[shizznit]

NP tg. it sparks conversation, which is a catalyst of learning....

 

[nephrosis]

....

OMG SHIZZNIT!!! you are the MAN! explains it perfectly for me!

this is legit, and makes so much more sense in my head... ALSO it makes more sense because it says mh for commercial! IMO i think they just put the hps bulb up there to market to 2 markets instead of just saying MH is better all around. ESPECIALLY when using enhanced spectrum bulbs with good uv emition! i think this 7200k bulb has something to do with it...

I want to see a MH 6.4k vs MH 7.2k!! For me i noticed that the 7200k Produces way more internoding and less stretch ( more compact but still insain growth ).

just an idea?

 

[shizznit]

Sunpulse has a commercial-grade 1000 that's 5.7K, perfect IMO....

A great read is Secrets of High Yield Plant Growth by Graham Reinders, it states that MH is the best primary light source, and closest to the color of the sun, HPS is a good supplemental light (like greenhouses use) to the sun....

Look for companies that include a CRI rating with their light systems (color rendition index?), some spinning Sunpulse systemshave a CRI of better than 95% of the sun, individual bulbs 85%+....

 

[Stonefree69]

I want to see a MH 6.4k vs MH 7.2k!! For me i noticed that the 7200k Produces way more internoding and less stretch ( more compact but still insain growth ).

just an idea?

I'm wondering about how good Ushios are for MH spectrum. They always rank near the top and claim a wider spectrum. Even them and Hortilux are putting blue in their HPS lamps. That's gotta say something when 2 of the best lamp makers are doing it! There's also Digilux and Plantmax that rank high in PAR output (for HPS anyway).

 

[nephrosis]

I'm wondering about how good Ushios are for MH spectrum. They always rank near the top and claim a wider spectrum. Even them and Hortilux are putting blue in their HPS lamps. That's gotta say something when 2 of the best lamp makers are doing it! There's also Digilux and Plantmax that rank high in PAR output (for HPS anyway).

Yes but why not get a bulb that emits uvb rays also!! I totaly agree with multi spectrum bulbs but why not get a multi spectrum bulb that also emits UVB! uvb is also said to produce more thc resin as a natural sun block!

Add UVB with enhanced spectrum and you got yourself a killer setup!

I just agree with they way MH are used and the way they are used... I just have a feeling they will do more with MH then HPS in the long run due to plants and the light they take in... but thats just my oppinion

 

[DrFever]

Yes but why not get a bulb that emits uvb rays also!! I totaly agree with multi spectrum bulbs but why not get a multi spectrum bulb that also emits UVB! uvb is also said to produce more thc resin as a natural sun block!

Add UVB with enhanced spectrum and you got yourself a killer setup!

I just agree with they way MH are used and the way they are used... I just have a feeling they will do more with MH then HPS in the long run due to plants and the light they take in... but thats just my oppinion

Ultraviolet (UV) radiation has a number of negative effects on life forms on earth. The paradox exists because of the wide spectrum of light emitted by the sun, and how plants use the energy that makes it through the atmosphere. For this reason, discussions of ultraviolet energy and damage often revolve around the ozone layer, which only lets in a fraction of the present UV light.
All light is a form of radiation--to be specific, a form of electromagnetic radiation. Not all of it is intrinsically harmful, however. Light differs based on its wavelength, frequency, and energy. Human eyes can only see a relatively small band of the different light rays, a relatively harmless section that makes up all the colors our eyes can perceive and is produced often by synthetic sources like light bulbs. Higher energy light waves have a higher frequency and cannot be seen by humans, but also have more potential to damage organisms.
Genetic damage is more frequently caused by UVB, the stronger type of radiation. These light waves pass into the DNA in the cells of lifeforms and damage them. This would be catastrophic, but cells can repair most of the damage the light causes. However, the damage is still done, and sometimes it cannot be repaired or is repaired incorrectly. This causes sunburn damage, dying leaves, and eventually skin cancers
Both plants and animals have a wide variety of tolerance for UV light. Some plants, especially dark plants with thick leaves, can withstand more UV light than lighter, more delicate versions. Cloud cover and rain fall will also disperse much UV light before it can reach the ground

 

[nephrosis]

Ultraviolet light is a wavelength of the light spectrum that is shorter than that of visible light. UV is on the far end of the violet part of the color spectrum, hence the name ultraviolet. Although humans are unable to see UV light we are aware of its existence and its effects. Sunburn is the most common result of UV light directly effecting humans, and once you’ve had a good sunburn there is no need for additional convincing that the rays are real. To block this harmful electromagnetic radiation, we put on sunscreen or find a way to shade ourselves on sunny days. Medical marijuana plant’s process the different types of UV light in different ways, including producing their own sort of sunscreen in trichomes. Let's examine the different types of UV light and their direct effects on plants.

UV-A is the long wave UV light—most commonly seen in a black-light. Its primary effect on plant growth comes at a hormonal level. This wavelength will eliminate or limit certain hormones within the plant, effecting the plant’s growth. Over millions of years, plants have created a synergistic relationship with their hormones and UV light. UV-A wavelengths can effect the structural growth in plants due to the hormones it helps to regulate.

UV-B light is the medium UV wavelength. This wavelength will effect trichome production in medical marijuana the most. A medical marijuana plant will create trichomes to protect itself from the would-be harmful rays of UV-B.

Trichomes are mostly made up of water, which acts as an absorber of the UV-B radiation. It also contains the majority of cannabinoids, found in a medical marijuana plant, including THC, CBN and CBD. In other words, the more trichomes a plant produces, the more cannabinoids (medicine) in the plant.

Many gardeners add UV-B specific bulbs to their indoor gardens to maximize trichome production. You can purchase UV-B bulbs at any pet shop where they are used for keeping reptiles. Another way to ensure your indoor garden has enough UV-B is to use metal halide bulbs in your blooming room because they naturally have a higher UV light output than high pressure sodium bulbs.

UV-C is the short wave UV wavelength. This frequency can cause adverse effects on plant growth. Receiving an abundance of UV-C light will cause severe radiation poisoning resulting in deformed growth, color loss or even death.

As biological creatures are concerned, UV light can be good or bad. I believe moderation is key when supplementing UV light in your indoor garden. If you want to add UV-B specific bulbs, I recommend supplying around 1/10th of the wattage in your garden. For example, if you have a 1000 watt flowering room, add 100 watts of UV-B. Another rule of thumb is to run 1/3rd of your blooming watts in metal halide. For example, in a 3000 watt bloom room, have 1000 watts metal halide and the remaining 2000 watts high pressure sodium. By adding additional UV-B light,t you should see an increase in essential oil production and, in turn, an increase in potency of your medical marijuana.

 

[shizznit]

but there's also....

Ultraviolet (UV) radiation has a number of negative effects on life forms on earth. The paradox exists because of the wide spectrum of light emitted by the sun, and how plants use the energy that makes it through the atmosphere. For this reason, discussions of ultraviolet energy and damage often revolve around the ozone layer, which only lets in a fraction of the present UV light.
All light is a form of radiation--to be specific, a form of electromagnetic radiation. Not all of it is intrinsically harmful, however. Light differs based on its wavelength, frequency, and energy. Human eyes can only see a relatively small band of the different light rays, a relatively harmless section that makes up all the colors our eyes can perceive and is produced often by synthetic sources like light bulbs. Higher energy light waves have a higher frequency and cannot be seen by humans, but also have more potential to damage organisms.
Genetic damage is more frequently caused by UVB, the stronger type of radiation. These light waves pass into the DNA in the cells of lifeforms and damage them. This would be catastrophic, but cells can repair most of the damage the light causes. However, the damage is still done, and sometimes it cannot be repaired or is repaired incorrectly. This causes sunburn damage, dying leaves, and eventually skin cancers
Both plants and animals have a wide variety of tolerance for UV light. Some plants, especially dark plants with thick leaves, can withstand more UV light than lighter, more delicate versions. Cloud cover and rain fall will also disperse much UV light before it can reach the ground

The Earth’s atmosphere blocks 98.7 percent of the Sun’s UV radiation from penetrating through the atmosphere. The 2.3 percent that gets through has both positive and negative effects.
Positive (beneficial) effects of UV

• Triggers vitamin D – UV from the Sun is needed by our bodies to produce vitamin D. Vitamin D helps strengthen bones, muscles and the body’s immune system. It may also lower the risk of getting some kinds of cancers such as colon cancer.
• Helps some skin conditions – UV is used in the treatment of skin conditions such as psoriasis. This is a condition where the skin sheds its cells too quickly and develops itchy, scaly patches. Exposure to UV slows the growth of the skin cells and relieves the symptoms.
• Helps moods – Research suggests that sunlight stimulates the pineal gland in the brain to produce certain chemicals called ‘tryptamines’. These chemicals improve our mood.
• Helps some animals’ vision – Some animals (including birds, bees and reptiles) are able to see into the near UV light to locate many ripe fruits, flowers and seeds that stand out more strongly from the background. The fruits, flowers and seeds often appear quite different from how humans see them. For example, when seen in UV light, some flowers have different line markings, which may help direct bees and birds to the nectar.
• Aids some insects’ navigation – Many insects use UV emissions from celestial objects as references for navigating in flight. This is why a light sometimes attracts flying insects by disrupting their navigation process.
• Useful for disinfection and sterilisation – UV has positive applications in the fields of disinfection and sterilisation. UV can effectively ‘kill’ (deactivate or destroy) microorganisms such as viruses and bacteria, for example, when hanging cloth nappies, underwear and tea-towels outside on the clothesline. To destroy the microorganisms, UV rays penetrate the cell's membrane, destroying the DNA, and so stops its ability to reproduce and multiply. This destructive effect explains why we can use UV antibacterial lamps for disinfection and sterilisation.

 

[C.R.E.A.M.]

why only mh doesnt it only provide a blue spectrum?

 

[highonmt]

why only mh doesnt it only provide a blue spectrum?

Your answer is found in the last 23 pages of awesome posts.

I use only metal halide in flowering now. I was having heat issues with the hps switched back to my veg lights and the plants loved loved it.
If you know anything about the visible spectrum you should know that red is hot blue is not. Think of infrared red lamps then look at the light from you hps very similar imo. I am selling my HPS ballasts and buying more MH. This is a great thread.
HM

 

[shizznit]

why only mh doesnt it only provide a blue spectrum?

In general we are referring to single light source lighting.
There are multi-light, but for most this means a MH for every several HPS, and the plants never get more than one color.
If you are only going to give your plants one color, MH is better than HPS.

 

[shizznit]

I am selling my HPS ballasts and buying more MH. This is a great thread.
HM

Sunpulse sells a splitter that allows you to take your 1000w magnetic HPS ballasts and run 2x 600w HPMH (Sunpulse bulbs) off them.
HPMH is a great advance, and you get some free energy, as a 1000w ballast draws almost 1100w, these special Sunpulse bulbs run very efficiently and produce full-color light at about 550w each....

 

[the gnome]

Your answer is found in the last 23 pages of awesome posts.

I use only metal halide in flowering now. I was having heat issues with the hps switched back to my veg lights and the plants loved loved it.
If you know anything about the visible spectrum you should know that red is hot blue is not. Think of infrared red lamps then look at the light from you hps very similar imo. I am selling my HPS ballasts and buying more MH. This is a great thread.
HM

 

[bowzer]

So I've been loaned a brand new 600w hps/mh electronic ballast,w/hood, it also came with brand new mh and a hps bulbs.

This brings my light count to 1-250w/mh/hps, 1-400w/hps, and one 600w/mh/hps.
I just built a 4x4 veg room, to support a 4x6 flower room. I'm moving the 250w/mh to the 4x4 room for veg, and putting the 600mh/hps and 400hps in the 4x6 room for flowering.

So, according to this, I should run the mh bulb in the 600?? I was flowering at 2/1 400hps/250mh, and happy with the results, if i switch and run 3/2-600mh/400hps for flowering would this be a good combo?? I have no idea of the spectrum of the 600 halide bulb, I think its a grow lush?? not sure, MH600GL is only the printing on bulb. Any input??

 

[blueberrydrumz]

great thread!has anyone used these?http://www.ebay.com/itm/MH-Lamp-600...pt=LH_DefaultDomain_0&hash=item19d722d6b8they are 4200 Kelvin, wheras Kelvin doesnt say much about the actual colour output, looking at the spectrum they look good for veg atleast! they are realy cheap around 20$any advise?

 

[BasementGrower]

with all the bullshit info on here. with people doing tests without a control room... .. the entire mh vs hps.. i dont know i think its strain dependent.. depends what it was bred under? i dont know but im so fucking confused.. i run hps for flower.. and now i wana try mh. but im affraid that it will fuck up my harvest and i depend on my harvest to live now that my job has cut back on hours .

 

[Hank Hemp]

Won't fug up your harvest. May get a smaller yield. The fall sun is more gold in color so HPS mimics that sun. Don't let anyone tell you different. It's that simple. I've done both, HPS is best in flower.