Starting my grow

[Woodbeeskunked]

I received my seeds today and want to start them under 150W hps for 2 weeks.. then put them under 1000W MH... the seeds are autos and using FFOF with FF nutrients. Is there a lot of objections to starting these under 150 hps? I am new to this so plz help if you can

 

[TheSadVeryBadMadGrower]

I received my seeds today and want to start them under 150W hps for 2 weeks.. then put them under 1000W MH... the seeds are autos and using FFOF with FF nutrients. Is there a lot of objections to starting these under 150 hps? I am new to this so plz help if you can

Keep the light rather high. Seedling don't need much at all.

 

[.Smoke]

No problem starting with the HPS. Above poster is correct.
Make it easy on yourself. Download a Lux app on your phone. Hang your 150w to where your seedling is getting 11k Lux and you should be good.
2 weeks and hit up the 1000w. Mine go under a 1k right about that time.

Best of luck and happy growing!

***Edit. If you find you like using the Lux app, drop $30 and get a real meter when you can. Those apps are not very accurate but are good enough to get started.

 

[Woodbeeskunked]

Gray thank you for the response. Would 24” be too high? Will this method of money savings strategy hurt my total yield. I will be using the low stress training when switching to the 1000W MH

 

[BluntMoniker]

A 150w HPS isnt much, but it's a lot more than a seedling needs. You could get away with using a CFL, bit If your going to use the 150w, just keep it at a good distance away. 24-30in should be fine, as they really arent nearly as intense as higher wattage HPS fixtures.

And be careful with ffof.. it's great stuff, but can be a bit hot on seedlings, and with autos, you wanna do everything you can to prevent stress. I'd suggest mixing it 50/50 with ff happy frog if possible. Itll lighten the soil, and help prevent burning on young seedlings

 

[Woodbeeskunked]

I will take your advice on the lux app. This forum is awesome. I am starting 2 plants in my new room 5’x6’x 7’ ceiling. I hope not burn my plants with 1000w bulb. Will have 6” exhaust for heat.

 

[.Smoke]

Gray thank you for the response. Would 24” be too high? Will this method of money savings strategy hurt my total yield. I will be using the low stress training when switching to the 1000W MH

Haven't ran a 150w so cant help on height. That's why the Lux meter is so important.
You won't suffer on yield. Running the 1000w right now would just be a waste of energy.

 

[.Smoke]

I will take your advice on the lux app. This forum is awesome. I am starting 2 plants in my new room 5’x6’x 7’ ceiling. I hope not burn my plants with 1000w bulb. Will have 6” exhaust for heat.

You'll be fine. This is a 1000w hps @ 10" above the plant. (In Flower)

Air cooled hood is a must have!

 

[.Smoke]

Oh yeah,
Welcome to RIU!

 

[Sfrigon 1]

Welcome! I got a 150 hps , seedlings I do 18-24 in. They love the warmth right now too! Best of luck

 

[Sfrigon 1]

Definitely ease them into that thousand . Those things are dangerous, especially coming from a 150 of a dif spectrum

 

[Woodbeeskunked]

I have the umbrella style hood for my 1000w hps.. I will adjust my in and out vent to accommodate.

 

[Sfrigon 1]

Not just heat , the power of those are intense. If it feels warm on the back of ur hand move it up . I am just speaking from experience I lost seedlings

 

[xtsho]

I have the umbrella style hood for my 1000w hps.. I will adjust my in and out vent to accommodate.

You might want to think about getting a sealed hood. A 6 inch 400+ cfm fan can pull a good majority of the heat produced by a 1000 watt out of the grow area when you're using a sealed hood. You can get a sealed hood for around $50. Also you mention both MH and HPS so I'm assuming that you're using a digital ballast that accommodates both types of bulbs. That's important because some of the older ballasts will only run one kind of light.

 

[.Smoke]

@xtsho is absolutely correct. In my 4'x4'x7' tent I have a 435cfm 6" exhaust, air cooled sealed hood running a 1000w mh right now. My room temp that the tent is in is 70F. At 100% exhaust my tent is 80F. In that parabolic reflector your room is gonna be 95F+ in minutes with the 1000w.

 

[Woodbeeskunked]

I do have a 6” exhaust at 435 CFM’s. This room is in that basement with an ambient temp of 68~. A little cooler in the summer. I am drawing air in from the lower 1/3 and exhausting from the ceiling at opposite walls. The cubic feet in the room is 210 the exhaust fan should turn over the air 2x pr min. Am I missing something on the temp getting to 95*? Yes I have a ballast for both hps & my.

 

[.Smoke]

I do have a 6” exhaust at 435 CFM’s. This room is in that basement with an ambient temp of 68~. A little cooler in the summer. I am drawing air in from the lower 1/3 and exhausting from the ceiling at opposite walls. The cubic feet in the room is 210 the exhaust fan should turn over the air 2x pr min. Am I missing something on the temp getting to 95*? Yes I have a ballast for both hps & my.

How to Choose the Best Growing Medium for Hydroponic System

How to build a grow room part 4 - indoor hydroponics for beginners

www.advancednutrients.com

They're like, really fucking hot

 

[Woodbeeskunked]

Thank you for the info. I think I need to do a 24 hr dry run to check any heat issues.