400w CMH or 600w MH/HPS?

[Budder Fingers]

Im running 4 x 3.5gal coco hempys in a 4L x 4W x 6H room with an air cooled hood, no temp/vent issues and it's time to upgrade my X-brite 400w combo bulb (200w MH & 200w HPS) and home made ballast that has served me well through my initial grow.

Which light set-up do folks recommend and why?

400w CMH throughout or 600w MH for veg and 600w HPS for flower?

Cheers!

....................................

 

[Hugo Phurst]

I'd say go with the CMH, just because I want to know how well they work.

 

[Budder Fingers]

haha. Another one I like the look of is the Sunmaster Full Nova, I like the simplicity of the single bulb grow

 

[a senile fungus]

@GroErr uses a 315w Sunsystem LEC in a similar footprint with amazing results.

Check out his thread called GroErr Grows

 

[a senile fungus]

I'm using two 315w CMH in the 4K spectrum and my plants are liking them so far, no complaints other than quality light and not much heat.

 

[Budder Fingers]

I'm using two 315w CMH in the 4K spectrum and my plants are liking them so far, no complaints other than quality light and not much heat.

What type of hood do you have. Mine is air cooled with glass I was just reading that the uv light of CMH gets blocked by the glass??

 

[a senile fungus]

No hood. Mine are hanging barebulb. I'm pretty they still put out UV, I'd have to check the sprectum chart to be sure.

 

[nl5xsk1]

I have a 3.5 x 4ft, 6 tall, run a air cooled 600 and get attached results: 42 days

 

[drolove]

i like the 600s

 

[Budder Fingers]

I have a 3.5 x 4ft, 6 tall, run a air cooled 600 and get attached results: 42 days

Looks awesome. What kind of 600?

 

[nl5xsk1]

Looks awesome. What kind of 600?

Ultra Sun HPS with a mag. Ballast, I think its more important to pay attention to the plants, they will tell you what they need. the room is tight , clean, and ventilated properly, this particular run i'm using Dyna Bloom, and organic soil base

 

[Budder Fingers]

Ultra Sun HPS with a mag. Ballast, I think its more important to pay attention to the plants, they will tell you what they need. the room is tight , clean, and ventilated properly, this particular run i'm using Dyna Bloom, and organic soil base

My plants are happy, rooms dialed in high 70s day - high 60s night w/ 40% humidity. OC+ coco/perlite hempy

I'm at three and a half weeks flower and I was hoping the buds would be a little fuller by now, Im happy with my nutes/mix/environment but think some more light would help

..................................

 

[Budder Fingers]

Ultra Sun HPS with a mag. Ballast, I think its more important to pay attention to the plants, they will tell you what they need. the room is tight , clean, and ventilated properly, this particular run i'm using Dyna Bloom, and organic soil base

You running that bulb for the whole grow? And whats that strain? Looks really nice man, great job

 

[spek9]

Another vote for 600w HID here.

Why? Experience mostly. Although there are some who use other lamps, in person I haven't seen anything compare to HID. Until I do, I'm sticking with what I know works.

Disclaimer: I veg with LED.

-spek

 

[Heygurlll]

Ummmmmm..... Hate to sound stupid, tried googling it, what is OC +? Own compost?
edit- nevermind

 

[nl5xsk1]

You running that bulb for the whole grow? And whats that strain? Looks really nice man, great job

Elephant Bud: Rooted Cuttings go right to 18 hr room,then at 18", into the hps room .
Yours look great and they will start to really put on the weight by day 30 and through out

 

[dbkick]

Sun systems LEC 315 . You won't look back.

 

[Budder Fingers]

Elephant Bud: Rooted Cuttings go right to 18 hr room,then at 18", into the hps room .
Yours look great and they will start to really put on the weight by day 30 and through out

BTW when do start the day count? The day you flip or when flowers start showing?

 

[nl5xsk1]

BTW when do start the day count? The day you flip or when flowers start showing?

!st. day of 12 Hrs.

 

[nl5xsk1]

My plants are happy, rooms dialed in high 70s day - high 60s night w/ 40% humidity. OC+ coco/perlite hempy

I'm at three and a half weeks flower and I was hoping the buds would be a little fuller by now, Im happy with my nutes/mix/environment but think some more light would help

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View attachment 3337925

These will concentrate on heavy flower production , the stretch is done, water and "watch them grow"