Metal Halide VS High Pressure Sodium FLOWERING
- Thread starter whoreable
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Doctor Cannabis
Well-Known Member
Wow, born2killspam... that's certainly some useful info there. Thanks.
born2killspam
Well-Known Member
One day I'll have a self sustaining (cold)fusion reaction hovering above my plants.. One day..
born2killspam
Well-Known Member
Thats a good bulb, but its not quite the same.. I used the same hps bulbs..
Doctor Cannabis
Well-Known Member
Are there any bulbs out there with NO green? Just askin, I only know of LED grow lights that have just red and blue, but they don't compare to HID bulbs...
born2killspam
Well-Known Member
There will inevitably be electronic transitions applicable in the gas mixture to produce some greenish light.. They need a pretty complex soup of gasses to create a desirable colour mix, and with complexity comes difficulty organizing for the theoretically ideal scenario..
LEDs on the other hand are monochromatic.. Their light output will be a single peak at whatever wavelength they pump out..
LEDs on the other hand are monochromatic.. Their light output will be a single peak at whatever wavelength they pump out..
Doctor Cannabis
Well-Known Member
Yeah..that's one reason why they're still not great for growing...
born2killspam
Well-Known Member
Well, if that peak is in a photosynthetic hotspot like 660-680nm, then you'll get allot more photosynthesis/watt using that.. If you had an array of LEDs that covered the wavelengths of all important light dependant reactions in plants (with the majority focusing on chlorophyll peaks) then you could grow more bud with fewer watts than anything else on the market today..
Cost would be ridonkulous though by today's standards!
Cost would be ridonkulous though by today's standards!
Bon Doogey
Well-Known Member
I will be using an 250W MH for Vegging and 250W HPS for Flowering...I notice some talk about lankier grows from one or the other...I will be adjusting my light height throughout growth will this help with that issue....
born2killspam
Well-Known Member
Use both lights for flowering..
Bon Doogey
Well-Known Member
I have a small grow area wouldn't be able to fit two lights unfortunetly.
MuyLocoNC
Well-Known Member
So going by what I read here, why do I keep getting told by experienced AUTO growers that the MH is NOT good for vegging autos...even with a short veg period, it would seem that MH would be best. I keep getting told to use a 125W CFL for the veg then switch to my 400W HPS.
lopezri
Well-Known Member
Ahhh! Man! That makes sooooo much sense! I'll have to remember that!
lopezri
Well-Known Member
Whoah! This really IS advanced growing section, isn't it!
bicycle racer
Well-Known Member
m.h.blue spectrum for veg is similar to spring/summer light spectrum. hps yellow/red spectrum is similar to fall/winter. both of course would be most complete. but if choosing only one hps is hands down better for flowering not to mention hps puts out significantly more lumens at the same wattage so more efficient again hps is best for flower. of course a true complete spectrum is best but you stated you can only fit one light so hps is the way to go. i supplement with blue spectrum cfls on the edges of my garden to get shorter length internode spacing they take up little space but this is not neccesary.
smoke and coke
Well-Known Member
IMO ive never grown autos as of yet. but i think that a MH for veg helps give you a shorter denser plant, where as an HPS will have some stretch.
therefore useing an hps will give your autos some stretch so that you dont end up with like a 1 foot plant.
F
fureelz
Guest
Ever seen a pro veg with HPS? negative. Ever seen a pro flower with MH? rofl waste of time. Sure you can do it, you just wouldn't be a PROFESSIONAL. mmmkay thanks. And if you think that i think that im a pro, yes i am! <3 you all.
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