Standard advice says you should aim for 32-50 watts per square foot of grow space. More like 25 watts if your grow space is a dedicated veg tent. So if you were working with a 3′ x 3′ space, you’d theoretically want an LED light with a power draw somewhere between 225 watts (vegetative) and 450 watts (flowering).
Accordingly, how many grow lights do I need per plant?
How many plants per LED grow light?
|Grow Room Size||Square Feet||Recommended # of Plants in Veg|
|2′ x 4′||8||Up to 8|
|4′ x 4′||16||Up to 16|
|5′ x 5′||25||Up to 25|
|6′ x 6′||36||Up to 36|
Furthermore, how many grow lights do you need for 4 plants?
Recommended assuming 4.0 sq ft/plant
|# of Plants||Square Feet||Wattage from Wall|
|1||4||120 to 140 watts|
|2||8||240 to 300 watts|
|4||16||500 to 650 watts|
|6||24||700 to 860 watts|
Are 2 grow lights better than 1?
Multiple light setup
If you are an experienced grower or have a larger growing space, you will inevitably need more than just one grow light. For example, a 4′ x 8′ grow tent will need at least two grow lights, each able to cover a 4′ x 4′ area.
The SolarXtreme 250 cannabis LED light draws 200 watts of power and is suitable for spaces up to 9 square feet. So a 2′ x 2′ tent or a 3′ x 3′ tent is a great fit with this light. Given its full spectrum capacity, it’s a light you can use for vegetation through flowering.
How Much Light Do You Need? Once you’ve decided which kind of plant grow light you want, it’s time to decide how big a bulb you need for the space you have. First, determine how much space you need to illuminate. As a rule of thumb, aim for 20 to 40 watts per square foot.
The 8×8 footprint of this these tents will need about four or so 600 watt or equivalent grow lights to fully cover the space.
Therefore, you’ll need around 120-140 watts of light power for a 2×2 tent harvest. So, you’ll need a 220 watts light source for your 2×2 grow tent. You can also use 2 lights of 120 watts. But with more lights come heat issues.
When we use too many grow lights, we can create unnecessary issues. But, with strategic movement systems, we can use fewer lights to receive the same, or even better results. Those results may include faster growth, even canopies, better light penetration, and higher yields.
As such, it could provide solid coverage for up to 4 plants. Yield Lab 1000W HPS+MH Cool Hood Reflector Grow Light Kit (Price: $239.95) — With a 1000w grow light, you’ll get 130,000 lumens from an HPS bulb and 110,000 lumens from an MH bulb. That’s sufficient to provide coverage for up to 6 plants.