How Many Lumens Do I Need To Grow Vegetables

Growing vegetables has become a common hobby. It's now a sport for city dwellers.

How can you grow vegetables in an apartment without soil or sunlight? Plant grow lamps save the day. 

Grow lights come with bulbs of various lumens. Brighter bulbs have more energy. For full-sun plants, a minimum of 2000-3000 lumens is adequate for starting the seed.

Lumens increase with plant age. Medium-lighting plants need 5000-10000 lumens during blooming. Vegetable type and ripeness determine lumen count.

Lighted plants

Plants: 5000 Lumens Light Enough?

Medium-light blooming plants require 5000 lumens per square foot for optimal growth. When they grow, plants need more lumens.

The average amount of lumens for a plant near its flowering stage is 7000-7500 lumens. The plant should grow with these lights.

If you have a plant lamp that only emits 5000 lumens, you will get plant growth, but your plant will not be as healthy as it could be.

How Many Lumens Does a Tomato Plant Need?

If you start a tomato plant from seed indoors, you will want at least 3000 lumens from your grow lamp. Any lower than this can cause a delay in sprouting or even no germination at all.

Once the seedling has erupted from the soil, 7000-7500 lumens are ideal for proper plant growth. When the plant is coming near its flowering stage, 10000 lumens will give you the best hope of getting those bright red, juicy tomatoes.

See also When to Grow Plants in California

If a tomato plant does not have enough light, it cannot grow fruit. Therefore, it is important to provide your tomato plant with enough light to reap the benefits of gardening.

Is 1000 Lumens Enough for Plant Growth?

1000-lumen lamps exist. Will this grow my plants? 1000 light is low for plant growth.

These lights may grow plants. If you have a tiny space and a few plants, a 1000-lumen light bulb may be enough.

Mature plants need 7000-7500 light. Plants deficient below this. 1000 lumens may be enough to germinate seeds in a confined space.

When the plant matures, increase light.

4000 Lumens for Plants?

Seedlings need 3000–5000 light. You can start seedlings and grow a plant with a 4000 lumen lamp.

Higher lights germinate seeds faster. A 4000-lumen lamp can germinate seeds and last your plant.

If you can't get a higher lumen lamp later, move the plant to a smaller area to give the 4000 lumens the best chance of being enough.

Why Is Growing Plants Good?

Finding a light bulb's watts is difficult. Is an LED bulb or an incandescent bulb best for plant growth? LEDs produce more lumens with fewer power.

Get enough lumens with a high-watt lamp. Plants need sun to grow.

5000-lumen bulbs work well for seedlings and mature plants. 5000 lumens is enough to start seeds, which require 2000-3000 lumens.

When your plant matures, it may need more light to survive. After emerging from the dirt, the plant will grow with 5000 lumens but will need more.

Your plant may need 7500-10000 lumens, depending on its sort. 5000 lumens may be enough for a smaller shrub that doesn't flower.

Vegetables and flowers need more light. 

Tabletop plant under purple light.

House Plants: How Many Lumens?

Indoor plants need light depending on the plant. Full-sun plants need more light. Find the lumens needed for your home plant.

Farmers' Guide to Plant Hardiness Zones

Non-flowering indoor plants need 10000 light for full-sun and 5000 for partial-sun.

Because oak and willow require a hard winter freeze, only tropical and subtropical trees will live indoors.

Consider your living conditions and what plants would work best, then study the lumens for that indoor plant.

Seedling Grow Lights

Many growers start their seedlings indoors under a grow lamp in late winter to early spring so they can transplant outdoors when the weather warms up.

2000–3000 lumens per square foot of growing area is needed for full-sun seedlings. 

Kelvin and Lumens

Healthy plants require understanding lumens and kelvin.

Lumens measure brightness, and kelvin measures hue. Higher lumens and kelvin are directly related.

A light lamp above 5000 kelvin excludes so much red light that your plants will grow slowly and weakly.

Flowers need blue light. Grow best with a 1000–5000 kelvin light lamp.

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