UVA/UVB the real deal. A must read topic for all growers.

growingforfun

Well-Known Member
You say yOu run 300 watts of uv per 1000 watts, so I can't help but wonder how 1000 hps with 2 150 watt hps would do. Your yeild has to be 30% more to justify cost in my eyes
 

intensive

Well-Known Member
I saw the vid when it first came out, bought the reptile lights, and didnt notice any difference. Growing great pot isnt hard, and it can probably be done with alot of different lights. I still have those uvb reptile lights sitting around in a drawyer somewhere.

I understand what that guy meant when he said his buds were potent enough. Iv grown nugs I can't even medicate with because they are mind expanding and just to much, even after a hashy weekend or two.

I would consider reading about the rizosphere and root zone and how organics come into play alot more helpful, cheers
 

Blunt Master Flex

Active Member
I've grown some okay stuff myself, but not once did I think it was so good that I don't want it to be better, if that's the case just take a hit. I can honestly say that I've never come across ANYTHING so dank that I couldn't take a blunt to the head.
 

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pharmacoping

Active Member
Last year I ran 1k bulb made for this and finished all of my plants off(during spring water flush(1-2 weeks) and some made really cool hash tips, but all were much much more trich topped than anything I've seen grown without the light. Its expensive though, as I had to use a whole seperate area/system to do this. You have to avoid the light, its pure tanning booth.

speaking with the techs who developed it theres more to it than just creating thc/trichs to protect the girl from uv rays. it seems some landraces, columnia,acapulco gold,panama red, some brazilian strains etc have latent dna from beginning their growth between specific parrallels on earth, where radiation is strong and causes mutations, as it does in tissue culture also. these are unlocked under the right light(s) our normal grow lights/hood lens') purposely block these rays for our safety. removing that glass increases both par and uv.

two cents
 

Rcb

Well-Known Member
with all the talk about uvb and uv in here everyones posting on the retile light have u guys looked into CMH they put out more uvb then a regular mh and they operate on a hps magnetic ballast only\
 

RawBudzski

Well-Known Member
I would work on making the grow room 100% perfect in terms of temps, feedings and humidity. before turning to this method of making better bud.
 

Brick Top

New Member
with all the talk about uvb and uv in here everyones posting on the retile light have u guys looked into CMH they put out more uvb then a regular mh and they operate on a hps magnetic ballast only\

They are also full spectrum bulbs and you are better off soaking your plants in the Kelvin temperature range light they need st different times than feed them a steady diet of cull spectrum light.

Compare the CMH and a HPS.







That's not an advancement in lighting. Consider the amount of light rays that plants not only will not use, but just plain cannot use even if it tried that the CHM puts out, when using a proper MH in veg and a proper HPS in flower will give plants the most of the light colors they need instead, and not waste part of their light production on useless light colors.

CMH is not a step forward or an advancement. It is like auto-flowering strains, something made as simple as possible so no thought or knowledge and little to no skill and expertise have to go into growing. Gee, great, with a CHM you don't have to change light bulbs ... so it's easier, it removes one step, it makes growing simpler, so therefore, in the minds of some, that makes up for any and all drawbacks making it an advancement, a step forward in equipment rather than just one more sub-par gimmick to get your money.

I can see the writing on the wall. The days of the real true grower are coming to an end. Before long everyone will have their Little Suzie Homemaker Easy Bake Oven (Good Housekeeping Approved UL Stamped) version of grow setups, were getting almost halfway there already with all the people creating lighting systems from home lighting bulbs for various designed for various home light fixtures made to create small amounts of light for small areas, and the ones who at one time did it best will end up going the way of the dinosaur.
 

Rcb

Well-Known Member
They are also full spectrum bulbs and you are better off soaking your plants in the Kelvin temperature range light they need st different times than feed them a steady diet of cull spectrum light.

Compare the CMH and a HPS.







That's not an advancement in lighting. Consider the amount of light rays that plants not only will not use, but just plain cannot use even if it tried that the CHM puts out, when using a proper MH in veg and a proper HPS in flower will give plants the most of the light colors they need instead, and not waste part of their light production on useless light colors.

CMH is not a step forward or an advancement. It is like auto-flowering strains, something made as simple as possible so no thought or knowledge and little to no skill and expertise have to go into growing. Gee, great, with a CHM you don't have to change light bulbs ... so it's easier, it removes one step, it makes growing simpler, so therefore, in the minds of some, that makes up for any and all drawbacks making it an advancement, a step forward in equipment rather than just one more sub-par gimmick to get your money.

I can see the writing on the wall. The days of the real true grower are coming to an end. Before long everyone will have their Little Suzie Homemaker Easy Bake Oven (Good Housekeeping Approved UL Stamped) version of grow setups, were getting almost halfway there already with all the people creating lighting systems from home lighting bulbs for various designed for various home light fixtures made to create small amounts of light for small areas, and the ones who at one time did it best will end up going the way of the dinosaur.
ha well first off i wasnt saying its an advancement and i wouldnt use it as the only light source, most people are in here searching for more supliment lighting and a cmh with not only full spectrum and a good dose of uv/uvb it would be a fine light to add to a garden
whats not to love.
:)
 

Brick Top

New Member
Originally Posted by Brick Top

They are also full spectrum bulbs and you are better off soaking your plants in the Kelvin temperature range light they need st different times than feed them a steady diet of cull spectrum light.

Compare the CMH and a HPS.







That's not an advancement in lighting. Consider the amount of light rays that plants not only will not use, but just plain cannot use even if it tried that the CHM puts out, when using a proper MH in veg and a proper HPS in flower will give plants the most of the light colors they need instead, and not waste part of their light production on useless light colors.

CMH is not a step forward or an advancement. It is like auto-flowering strains, something made as simple as possible so no thought or knowledge and little to no skill and expertise have to go into growing. Gee, great, with a CHM you don't have to change light bulbs ... so it's easier, it removes one step, it makes growing simpler, so therefore, in the minds of some, that makes up for any and all drawbacks making it an advancement, a step forward in equipment rather than just one more sub-par gimmick to get your money.

I can see the writing on the wall. The days of the real true grower are coming to an end. Before long everyone will have their Little Suzie Homemaker Easy Bake Oven (Good Housekeeping Approved UL Stamped) version of grow setups, were getting almost halfway there already with all the people creating lighting systems from home lighting bulbs for various designed for various home light fixtures made to create small amounts of light for small areas, and the ones who at one time did it best will end up going the way of the dinosaur.
ha well first off i wasnt saying its an advancement and i wouldnt use it as the only light source, most people are in here searching for more supliment lighting and a cmh with not only full spectrum anda good dose of uv/uvb whats not to love.
:)

What's not to love? It's a known fact that if you flower with metal halide or use a mix of HPS and MH your yield suffers compared to going all HPS. So why add any light spectrum that will have a negative effect, or do absolutely nothing at all for plants since they do not use it, when instead you can use only those that have a positive effect?
 

Rcb

Well-Known Member
What's not to love? It's a known fact that if you flower with metal halide or use a mix of HPS and MH your yield suffers compared to going all HPS. So why add any light spectrum that will have a negative effect, or do absolutely nothing at all for plants since they do not use it, when instead you can as only those that have a positive effect?
umm hmmm ok you win no reason to get mad and fight over a silly subject :)

back to thead i had a question are there any other bulbs besides the retile bulbs that have uvb in them been searching cant find anything and is UVA helpful as well?
 

alphawolf.hack

New Member
i use regular mh fantstic results fter reading about cmh i will probably switch it into my flower i would not use a uv bulb because thats a waste of elec. for no lumens i have a chart on light output thats tells you the percentage of light rays a bulb emits but cmh is not listed... mh emits around 40% uva-uvb rays thats 40% of 400 watts so 160 watts uva-uvb which is nice i did alot of research on this because i want light that is very similar to the suns. so i replicate sunrise midday and sunset.
starts with 400w hps for 12 hours then a mh comes on for 6 hours in addition to hps 3 hours after hps starts and turns off 3 hours b4 hps stops. uvb is at its strongest during midday and loses strength as the day goes on ( side note hps emit 5% uvb-uva) hps and Mh combo will be better potency than an other bulb more light does mean more yeild but it does not mean more potency.
 
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Rcb

Well-Known Member
ok well u definately researched more then me could i get a link to that list?
 

Rcb

Well-Known Member
also in the video he says that you want a tanning light or a retile light um a realative of mine has a tanning bed they dont use(its 1 sided ,you would lay on a cot and then flip after a certain time) would this help in a garden?
 

alphawolf.hack

New Member
i wouldnt use those bulbs. once again they have some lumens but its not on par with lumen output of mh or hps. as far as the link i believed i googled hid light spectrum output or something like that it was a pdf i might have posted a link to it somewhere search the threads
 

Brick Top

New Member
i use regular mh fantstic results fter reading about cmh i will probably switch it into my flower i would not use a uv bulb because thats a waste of elec. for no lumens i have a chart on light output thats tells you the percentage of light rays a bulb emits but cmh is not listed... mh emits around 40% uva-uvb rays thats 40% of 400 watts so 160 watts uva-uvb which is nice i did alot of research on this because i want light that is very similar to the suns. so i replicate sunrise midday and sunset.
starts with 400w hps for 12 hours then a mh comes on for 6 hours in addition to hps 3 hours after hps starts and turns off 3 hours b4 hps stops. uvb is at its strongest during midday and loses strength as the day goes on ( side note hps emit 5% uvb-uva) hps and Mh combo will be better potency than an other bulb more light does mean more yeild but it does not mean more potency.


What amount of micowatts in what amounts in what size are will the CMH bulb emit? For example a reptile light, this particular one being one of the better choices, emits 150-200 microwatts per square centimeter (uW/cm2) of UVB and 900-1200uW/cm2 of UVA in a 30" circumference at a 24" to 36" distance (more if closer, and less if farther away) and at about it's maximum usable range, around 50-75 microwatts per square centimeter (uW/cm2) of UVB.

So I guess the question is, if your plan is to mimic the daylight, what daylight are you mimicking with your CMH, that of the UV lighting of some area with low UV lighting levels, like Northern latitudes around more or less around sea level, or an area with high UV lighting, like the equator and at altitude?

If someone is going to attempt to mimic nature, then mimicking the very best conditions nature offers should naturally be the intended goal. Rather than doing something that is just more like trying to mimic nature, in some area or another.
 
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