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Magicmunchietree

Best light for a small veg room.

29 posts in this topic

Hey all.

 

I have recently just built a veg room in my loft, adjoining onto my main room.  Dimensions:

 

1.7m long, 0.85m deep, 1.2m tall. Solid room made of beams and loft paneling, insulated with 50mm poly boards and then fully mylared. I Will be putting a 4 inch output fan in to vent out and leave door ajar to bring air in with an small desk fan to oscillate around, this will be done next week.

 

Ive just fitted a 300w CFL with reflector in as I just had it doing nothing and as I speak running some tests with 3 hemp seeds just as a practice, As I am a newb to doing.  I will be aiming to crack open my 5 Kalashnikovas (GHS) soon, and a choice of 1 or 2 others. I have a red diesel and Honeysuckle which keep taking my fancy. 

 

My temp is averaging at 24 degree, highest this week so far 25.7 and lowest is 23.1, light on 24.7. My light is as high as will go, around 1m high, with the 3 hemps on the floor. I soaked seeds for 30 min while I saturated coco in small pots with some root stim and let that just drain and soak in in the meantime. then just stuck the seeds 1cm into each pot. Took 3 days for them to rise which was yesterday and since that they have grown 4 inches. Now I know these are hemp seeds and they might  grow differently I dont know that much,  but 4 inch seems a lot to me.

Could the stretch be having the CFL light up at 1m? All 3 pots already have a big root coming out of the bottom and im just giving them small amounts of Growers ark rootstim and first feed, little and otfen to keep moist.

Im confident this environment is good enough to crack my Kalashnikovas soon. Is yet to be vented but I am installing a small 4 inch fan next week. But is the CFL good enough at that height as Im a bit surprised at the stretch of the testers im running. My actual area is only one half of the room, as it is long and narrow. Im aiming to be able to house 8 to 9 young plants when im confident over time in there in a 60x60cm deep garland tray. Would I be better switching to a cooler bulb in the hotter months as I feel all that CFL is a warm old thing. And if so, what are the best bulbs for that space?

 

A lot of questions I know, but I love this site and trust you all to be as helpful as we always are. 

 

Thanks lots.!

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I would have a t5 in there but that's a personal preference :thumsup:

 

Atb.

Edited by Fonz
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51 minutes ago, Fonz said:

I would have a t5 in there but that's a personal preference :thumsup:

 

Atb.

Ive contemplated them, how far away would you house a seedling from that sort of strip light?

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May be 2foot in the first few days after germination 1foot after about a week when 2nd lot of leaves then as close as you can once it's established 

 

I once ran a t5 that had p perspex cover over the tubes  , my cuts would be right up to it just an inch or so from the perspex or less if they were growing quick 

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There's led replacements for the t5 now so even less on the electric 

 

With a mix of cool white and warm white  you can flower under them too ! Iv seen a guys crop under t5's and I was impressed. 

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Ill bear that in mind, I like the idea of a T5 in my room because of how small it is. So keeping heat down is paramount as its 24 in there now during the colder months. Maybe adding the extraction next week might vent it better but Im looking ahead. It is what it is for now. 

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Fluorescents and cfls want to be closer than 1m,  much closer! 

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9 hours ago, Muppet said:

Fluorescents and cfls want to be closer than 1m,  much closer! 

Ok so, right now with that 300w CFL the temp this morning was 25 degree by the babies, with the CFL at 1m. Yeah I still think theyre a bit lanky but if I put the bulb lower its going to be too hot by the pots. So given my space is small, my growing area is probably 1m x 0.85m would I be better getting a lower wattage CFL or investing in the flourescents? as Ive been reading they run way cooler, but there again the lower wattage CFLs can be a lot cooler too. 

I just want to get the setup completely right before I run pop my real beans. How much light (watts) do I actually need for that size area aiming to house upto 9 babies? Can there be too little/much light at that stage? Im not talking about blasting them with 600w hps like, as thats silly, but in terms of the lower wattage bulbs can there be too much still? 300W actually feels like a lot. I have 2 x 600w hps for flower. 

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Imo 1x600w would be better for Veg and flower in that space, providing there's plenty of air movement seedlings a meter from a 600w will be fine. More light will stop the seedlings being so leggy. 

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5 hours ago, Muppet said:

Imo 1x600w would be better for Veg and flower in that space, providing there's plenty of air movement seedlings a meter from a 600w will be fine. More light will stop the seedlings being so leggy. 

Wont that just be way too hot with a 600 HPS? I have two air cooled hoods in my flower room and they still give off heat with a fan blowing through them.

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1m is too high for that light mate. If using your 600w hps, that would be about right height wise, but too much for that space as you said.

 

Get them as close as possible. Never used a 300w cfl but i reckon you could be inches away. Ignore radiant temps, and let the plant tell you if its too hot.

 

Realy upto you @Magicmunchietree but there's lots of ways to skin a cat lol The light you have should be fine mate, but figure out what you're aiming to do and any cost, or other restraints you have, and work back from there..

 

If you want your little ones to grow quickly, throw as much usable light and warmth as they'll take.

 

Flouro's and CFL's are great for veg in my mind. They're cheap, easily available from any home/diy shop and reliable. The plants can pretty much touch the bulbs with no ill effects so very good for small spaces, and you can use very low wattage to get them upto maturity. In your space, I probably would stick some t5's in there as previously said.

 

Personally, i have to slow things down in veg and with cuttings/mums etc. I currently use a four 10w single t4 flouro's.

 

large.5a8af8bb414e4_lowwattage.JPG

 

This veg cab is about half the size of yours.

 

There's actually only 10w's in the section on the left as the bulb went lol but they're just hanging about to be planted, or may end up as mums so 10w's is fine.

 

Not saying this is what you should do, just showing what can be done with minimal wattage in veg :yep:

 

 

Edited by the lone deranger
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Hello @the lone deranger how it going? 

It looks ideal, what do you do for ventilation? I see a hole in the floor there. How long are those 10 W t-4 bulbs?

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6 hours ago, Magicmunchietree said:

Wont that just be way too hot with a 600 HPS? I have two air cooled hoods in my flower room and they still give off heat with a fan blowing through them.

Shouldn't be a problem with half decent extraction. 

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@Sidi Hidi all good thanks mate. 

 

Theyre about 25cm long. Linked together like under cupboard style lights. I'll pm you a link. 

 

To be honest, I preferre proper T5's but these do work well for such a small space and low wattage. 

 

There's no extraction or movement as such. 

 

There are computer fans set up for input and movement between sections, but it's a summer back up to keep temps down. Not needed at the moment. 

 

 I sometimes run a passive extraction into a tent to take any smells away. 

 

I can get them upto maturity in there, the only problem is space for pots. I've usually got a lot going on, for such a small veg space, also getting ready for outdoor numbers rise pretty quickly lol 

 

Usually fill out final pots under hps in the tents. 

 

@Muppet you're right mate, but he'd need a big fan too. 600w hps and a 6" rvk? All a bit much for a little veg cab lol 

 

 

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Nah, decent 4" would do that. My first grow space was 4' x 2', 600w HPS, 4" L1, c/f and Tower fan. Took things from seed to flower no problem. 

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