Each plant will require an absolute minimum of 2,500 lumens. A standard 400W HID lamp will usually emit 45,000 lumens. This should be enough to comfortably grow up to 12 cannabis plants in a 1m2 area – with enough lumens to cause strong growth.
Accordingly, how many lumens do LED grow lights produce?
This is a measure of how well a light source converts energy (watts) into light (lumens). The old technology of tungsten incandescent bulbs only had an efficacy of about 15 lumens/watt; LED technology can produce about 60 lumens/watt.
Simply so, is 5000 lumens enough for seedlings?
I recommend a minimum of 2000 Lumens. With the white LEDs, you can actually find lights with 5000 Lumens or higher. … You can have success with bulbs that are 1750 Lumens and bulbs with a 4000 Kelvin rating. When your numbers are lower, you simply keep the lights closer to your seed starts and leave them on longer.
Is 1600 lumens enough for plants?
The optimal number of lumens is 7000 to 7500 lumens per square foot. For the plants that require minimum lightening, 2000 lumens per square foot is sufficient. … However, in the flowering phase, 5000 to 10,000 lumens are recommended.
The more lumens, the brighter and more powerful the light is. Vegetable seedlings and other “full sun” plants require about 2000 to 3000 lumens (at minimum) per square foot of growing space. So, if you’re growing just a single standard tray of seedlings, using a grow light that emits 3000 lumens is sufficient.
Foliage growth is generally best around 6500K, though many plants need a period of warmer light, around 3000K, in order to produce flowers, and thus fruit. In other words, if your goal is to simply produce seedlings, leafy green vegetables, or root crops, you only need higher spectrum bulbs.
Most plant leaves do their best conversion with sunlight between 3,000 and 4,000 lumens per square foot. … At a leaf’s peak efficiency of 4,000 lumens per square foot, that leaves an optimal coverage area of 25 square feet—or a 5′ x 5′ footprint—for a 1,000-watt bulb.