MH vs HPS for yield?

[tokersmoke]

Gnome he bought a solis tek and i have an ushio.

 

[tokersmoke]

Color temp seems to have little to do with what the plant actually sees.I would be Inclined to think that my ushio with the 7 k is better only because of the multiple spikes in color.An hps graph shows only spikes in the orange red and yellow.This is a very interesting thread i wish i had some hardcore science and cash to really try a bunch of different bulbs.

 

[mik']

thank for infos

 

[the gnome]

ok... got that backwards tokersmoke.

intresting on the solis tek, they use a low iron glass that's clearer, so more light getting thru.
well regardless how the plants interpret the Kelvin color range there is something in it they are utilizing imo,
the 6000K-7500K plus is what use for veg and I am satisfied,
when i started the indoor gig 4yrs ago i was using a 5000K range Mh and felt the plants were lacking in veg,
after 2-3 veg runs I started using a 6400K solarmax or sunmaster
and i was liking the way plants responded when I ran em.
now my poison of choice in veg is an ultra sun 7500K for around $42

 

[Fly by Night]

Strain dependent, can you tell wich hybrids prefer mh...sativas? Jus plugged in 2 solistek at 220v, one of each of their bulbs side by side (4k metal and hps). This room is indica, so I decided not to experiment here. Replaced the mh with a brand new horti hps, the solistek and horti appear exact same color and brightness btw

I grow 90% sours, tall plants with very little leaf. So mabe mh will limit stretch and spacing, someday we shall see...

Peace bebe

 

[the gnome]

fly by nite,
tbh, using the 4000K MH in my new bloom run which most the plants are from seeds they all seem to be doing great. so
there's a lot of different strain going on and they all seem to rock,
maybe i'm lucky..?

tbh again, the only substandard grows Ive ever had using Mh in bloom was when i used the hi blue K halides 6400K and a 7200K together.

I say grab a 4000K and jump in and see what happens.
since you already know what your HPS turns out with your sours you'll have an excellent reference point in which to gauge against the 4000K Mh

 

[who dat is]

I'm finding that the majority of these metal halide bulbs are rated for open fixtures. I was really wanting to check out the sun pulse or solis tek 4k bulbs but I'd be afraid of the bulb starting a fire if it were to fail. Does anybody have any input on this? For the record I'd be running vertically hung bare bulbs. 4 600s total, 2 hps and 2 metal halide. Anybody have any experience with this?

Thanks!

 

[the gnome]

who dat, MH can be extremely dangerous because of the hi pressures in the bulb they operate at.
its been likened if they explode it's in *grenade fashion*
so shrapnel glass at extremely hi temps will be flying.
I always wear eye protection for UV but more importantly incase of bulb failure.
Ive never seen or heard of one blowing
or read of one here yet, doesn't mean they won't.

i run open but the floor is concrete and nothing is really at risk in my room for fire.
if you run one open anything that can catch fire needs to be taken care of.
things like carpet or drapes, you can put cement board on the floor etc etc

another thing is if your in air cooled hoods and they blow, red hots glass shrapnel will get sucked to where ever, think about where that where ever is

 

[who dat is]

who dat, MH can be extremely dangerous because of the hi pressures in the bulb they operate at.
its been likened if they explode it's in *grenade fashion*
so shrapnel glass at extremely hi temps will be flying.
I always wear eye protection for UV but more importantly incase of bulb failure.
Ive never seen or heard of one blowing
or read of one here yet, doesn't mean they won't.

i run open but the floor is concrete and nothing is really at risk in my room for fire.
if you run one open anything that can catch fire needs to be taken care of.
things like carpet or drapes, you can put cement board on the floor etc etc

another thing is if your in air cooled hoods and they blow, red hots glass shrapnel will get sucked to where ever, think about where that where ever is

Yeah, definitely would be a bad situation in my setup in the crawlspace. 6 mil vapor barrier with the panda plastic over top is about as crazy as I want to get. Are there unnaturally higher risks of a bulb blowing with a metal halide over an hps? Supposedly hps bulbs are open fixture rated. In y'alls opinion should I just abondon the metal halide idea and just go with the tried and true hps?

Thanks

 

[the gnome]

where i get my Mh sylvie 4000K bulbs, not the hydro sites
they have halides w/protected arc arc tube rated for open lumenaires
for around $50ish i think.

check this out, i jus ran acrosst this about about the bulb I use

Suitable for open luminaires only if operated vertically +/- 15 degrees, provided the installation is not near people or flammable or combustible material; otherwise, this lamp must be operated in a suitably enclosed luminaire. (Additional information available upon request.)
Features

 

[who dat is]

where i get my Mh sylvie 4000K bulbs, not the hydro sites
they have halides w/protected arc arc tube rated for open lumenaires
for around $50ish i think.

check this out, i jus ran acrosst this about about the bulb I use

Suitable for open luminaires only if operated vertically +/- 15 degrees, provided the installation is not near people or flammable or combustible material; otherwise, this lamp must be operated in a suitably enclosed luminaire. (Additional information available upon request.)
Features

Are you speaking of 1000bulbs.com? I'm rocking 600's so bulb options and availability is a little more scarce.

What site do you get your bulbs from?

 

[the gnome]

I use to get the sylvies from plantlightinghydro,
1000Bs.com carries them also along with a host of other sites.

600s eh......
never used em but they seem to be a PITA for working with halides from what Ive seen.
or maybe not??

maybe get a dimable ballast and run 1000W'ers

 

[who dat is]

I use to get the sylvies from plantlightinghydro,
1000Bs.com carries them also along with a host of other sites.

600s eh......
never used em but they seem to be a PITA for working with halides from what Ive seen.
or maybe not??

maybe get a dimable ballast and run 1000W'ers

I just got some new to me 600 watt digitals though... Thanks for the input though. I haven't given up yet on the MH.

 

[the gnome]

all MH boom run

all MH boom run

chop time in the new room

no matter how much i tied these ladies up they're legs were dangling in the morning

 

[tokersmoke]

Damn nice what strain is that?

 

[the gnome]

CGS strawberry dogshit lol.... what a name but it rocks.
its a KKSC x og chem cross

 

[who dat is]

Do you grow organically or synthetically?

 

[the gnome]

synth whodat

 

[RB56]

Congratulations. How long till the next crop goes in?

 

[who dat is]

After searching around for a good bit it seems that really the only 600 watt metal halide bulbs are the ones made for agricultural purposes. I came across a 575 watt bulb but it wasn't rated for open fixtures. The widest availability for these type bulbs is 400 and 1000 watt. I think I'm throwing in the towel and going with HPS bulbs after all.