Bud2theBone
Active Member
5x5 grow space-I was told one 1000w hps is sufficient . Can I grow seed to harvest with hps only?? And is this wattage enough or too much??
Proper lighting and coverage
- Thread starter Bud2theBone
- Start date
tiltswitch
Well-Known Member
I put a gavita de 1000w in 1.2m tent so yeah youll do ok just make sure you have a good extraction at least a 6 inch rvk or equivalent as itl throw out sone heat.you can grow from seed with a hps but I dont recommend it if your new to growing. Get a cfl for your veging they're pretty cheap
Bud2theBone
Active Member
Can you tell me more about cfl
GreenHighlander
Well-Known Member
Get yourself some 4 ft T5s for early veg. A 1k hps is perfect for a 5x5 but there is a chance of you frying young plants with it plus they just don't need that much light for the first 2 weeks or so.
Cheers
Cheers
ChiefRunningPhist
Well-Known Member
You can see at the top of the list are the HID lamps, the HID technology hasn't progressed in efficiency since this report, so all HID are going to be close to ~2.0μmol/J.
1000W × 2.0μmol/J
=
2000μmol
(2000μmol/25ft2) × (10.76ft2/1m2)
=
860.8μmol/m2/s; ~861PPFD
The better the reflector the more even the spread.
1000W × 2.0μmol/J
=
2000μmol
(2000μmol/25ft2) × (10.76ft2/1m2)
=
860.8μmol/m2/s; ~861PPFD
The better the reflector the more even the spread.
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Bud2theBone
Active Member
I’m slow Idk how to like comments . Can you give more on T5. I have a 4ft floro 2bulb and an 8bulb HO t5Get yourself some 4 ft T5s for early veg. A 1k hps is perfect for a 5x5 but there is a chance of you frying young plants with it plus they just don't need that much light for the first 2 weeks or so.
Cheers
GreenHighlander
Well-Known Member
Not sure what you wanna know about T5? If you have an 8bulb HO t5 then I would use that from spout till flowering. Keep the T5s as close to the tops of the plants as possible . T5 wont burn them unless they are actually touching the bulb.
Cheers
twalte
Well-Known Member
I run the same....1000 watts in a 5x5. I start with a Hydrofarm fluorescent for seed while they are in solo cups. Less electricity for sure. Then I run at 600 watts as long as I can fit my girls under the light to get good light exposure. Once they get big enough for 5 gallon containers, then I switch to 1000 watts to cover the full 5x5 footprint.
Does your lamp run at lower wattages. You need less light during veg than you do during flower. I run my veg cycle at 600 watts until the plants start to hit the edges of the tent.
Here’s my little Hydrofarm T5. I run this with my solo cups. You can see I get the one gallons up close to the hood too at 600 watts.
I should add that up I use a cheap Lux meter to insure that my plants are getting their recommended levels.
Jump Start 2' T5 Grow Light System (Stand, Fixture & Tube) - JSV2 https://www.amazon.com/dp/B0006856EQ/ref=cm_sw_r_cp_tai_sK-0DbDE8DDGC
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Bud2theBone
Active Member
Bud2theBone
Active Member
So 600w t5 will suffice for veg??
twalte
Well-Known Member
I was saying to use your HID lighting but dialed back to 600 watts. Does your ballast allow you to run lower wattage bulbs? You can go HPS all the way, but I’d consider running a 600 watt metal halide to prevent stretch during veg and then throw your 1000 watt bulb in for when you move to larger pots.
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twalte
Well-Known Member
Using my lux meter and some math. I identified that I can effectively cover a 3.5 x 3.5 area and deliver sufficient lux for vegetative growth with 600 watts. So if my plants can squeeze together into a 3.5x3.5 space, then I plan to run 600. I’m generally 15 inches above my plants. I use a lux meter to verify. I use a square 26x26 air cooled hood which helps me get good coverage and allows me to get closer to the plants too.
I highly recommend a lux meter and learning how to use it at growweedeasy.com. You will see that the lux levels at the edges of the tent are weak.
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Bud2theBone
Active Member
Yes I can switch the bulb to MH. So 600 MH to veg then I can go to my hps to flower??
so I’ve heard. I was told a light bar would fix that
Bud2theBone
Active Member
The edges I mean
twalte
Well-Known Member
I don’t think a light bar is necessary....
And you could live under the 600 watts as long as your plants fit in roughly a 4x4 area. Once they get bigger and you find yourself filling up the 5x5 space, you will want to have your 1000 watts running.
Here’s a cool site where you can see your savings by running lower wattage bulbs.
Grow Light Operating Cost - Greentrees Hydroponics
Some facts about HID lighting operating costs and lamp replacement.
www.hydroponics.net
Bud2theBone
Active Member
Thanks a bunch friend
twalte
Well-Known Member
Glad it helped. Good luck with your grow. You should get some great bud with a 1000 watt HID, but be aware it puts out a lot of heat.
Bud2theBone
Active Member
Yes i heard. A decent fan will help cool??
twalte
Well-Known Member
Need to extract the heat from your tent and vent it out of your room somehow. Need a fan and filter. Mine runs through the light to cool the lamp.
I extract out of my bedroom into my basement. You could also run an air conditioner obviously.
