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
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\
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 gardenThey 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.
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.
umm hmmm ok you win no reason to get mad and fight over a silly subjectWhat'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?
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.