Last updated: August 7, 2021

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Are you an absolute hobby gardener? However, your plants do not get enough light and do not grow as you would like them to? Have you ever heard of a plant lamp? If the weather and light conditions in your area are not sufficient, a plant lamp is indispensable.

If you are looking for a plant lamp, you have come to the right place. Here at our large plant lamp test 2021 we present all the different lamp models. We not only inform you about the product itself, but also show you how to best install your plant lamp.




Summary

  • A good plant lamp is an indispensable tool for every (hobby) gardener. With a plant lamp you can decisively improve the growth and breeding of your plants.
  • Basically, a distinction is made between LED plant lamps with and without full spectrum. However, LED plant lamps with full spectrum are rather something for serious gardeners, as you do not necessarily need the full spectrum.
  • The mounting type of your plant lamp is also important - this determines which plant lamp is best suited for you. This is because not every plant lamp can be adapted to plant growth after it has been installed.

The Best Plant Lamp: Our Choices

Guide: Questions you should ask yourself before buying a plant lamp

What is a plant lamp?

A plant lamp is a special lamp that is suitable for growing plants. In order for the plants to grow under the most ideal conditions, the light sources of the plant lamp are specially adapted to their needs.

A plant lamp has different light sources, red and blue. These effectively support the growth of the plants. A good ratio between these is very important!

  • Blue light influences plant growth because it can be converted directly into chlorophyll.
  • Red light also promotes growth, but can harm the plant if it is too intense. This can result in long, sparse, leafy shoots.

Why do I need a plant lamp?

You need a plant lamp if you do not have enough natural light in your garden. There are certainly some plants in your garden that you want to support in their growth.

Plants need light so that photosynthesis can take place in the leaves. If there is not enough light, not enough nutrients will be produced and the plant will starve.

You can increase the light intensity if the natural light is not enough. This is especially true in winter, when plants don't get enough light anyway, but it can also apply to your plants in summer.

Some plants need more light than others, for example the chilli plant, which needs 14 hours of light per day. For growing such a plant, it is worth buying a plant lamp.

In the end, you should also think about this. If you only want to supply your plant lamp in winter, a simple plant lamp is sufficient.

Lampe über Topfpflanze

A plant lamp should help your plant to grow. (Image source: pexels.com / Nieves)

However, if you want to grow flowers or fruit, a good plant lamp makes more sense. There are special plant lamps with a grow lamp that are suitable for growing plants, so your plants will grow and thrive better.

Who is a plant lamp suitable for?

A plant lamp is suitable for everyone.

You can buy a plant lamp if you are a grower or a hobby gardener. There are no specific requirements for plant lamps, so you don't have to pay attention to anything in particular.

The only thing you need to consider is where your plants are and why you need the plant lamp. Depending on this, you have to mount your plant lamp accordingly. Not every plant lamp can be hung up, some have a stand.

You only need to pay a little attention to the angle of the light. If you have small rooms, you should hang your lamp in such a way that it scatters less light that disturbs you.

How much does a plant lamp cost?

You can buy simple plant lamps very cheaply. These are then also rather simple in their design.

Good plant lamps cost a little more, but are of a higher quality. In addition, these plant lamps often have extra features, for example they have different light levels.

Type Price
simple plant lamp from € 3
good plant lamp from approx. € 25
very good plant lamp from approx. € 100

However, you probably already know that buying a plant lamp is not just a matter of purchasing costs. You also have to take into account the increased electricity costs and possibly the replacement of the bulbs at the end of their life.

How does a plant lamp work?

Plants need sufficient light, especially in the germination phase. If it is not bright enough, the shoots grow too fast to get the light they need. As a result, however, the shoots are soft, pale and not very strong. They die.

You can prevent this problem with a plant lamp. Growth depends on the intensity of the light, but also on the red-blue light ratio.

Plant lamps are designed to mimic the spectrum of sunlight, giving plants particularly good flowers and high yields.

Plant lamps work in different ways. An LED plant lamp is very precise in its light spectrum. This means that the light can be better adapted to the needs of your plant.

Decision: What types of plant lamps are there and which is the right one for you?

There are different types of plant lamps. However, their aim is always the same: to strengthen plant growth.

In the following, we would like to introduce you to the 2 most popular types of plant lamps so that you can then make a decision. Depending on the purpose for which you need a plant lamp, a plant lamp with full spectrum is better suited for you than one with LED.

So there are plant lamps with:

  • LED
  • Full spectrum

Both plant lamps have special features and are particularly suitable for different needs. We will show you these in the following.

What distinguishes a plant lamp with LED and what are its advantages and disadvantages?

An LED plant lamp is particularly energy-saving. In addition, you can also realise new lighting concepts with this light source for plant cultivation.

Advantages
  • different colour spectra for plant growth
  • low heat emission
  • low power consumption
  • long life
Disadvantages
  • quite expensive to buy

The special thing about LED plant lamps, however, is that each LED shines in certain colour spectra, which allows you to create specific light compositions. This is especially important for you because the red-blue ratio has an impact on the growth of your plants.

What distinguishes a full-spectrum plant lamp and what are its advantages and disadvantages?

First of all, we would like to explain to you what a full-spectrum plant lamp actually is, because this may not be clear. Plants need light, and wavelengths in the range 400-700nm are used. This is photosynthetically active radiation (PAR).

Advantages
  • all necessary colour spectra for plant growth
  • light adaptation to plant stage
  • low heat emission
  • low power consumption
  • long life
Disadvantages
  • quite expensive to buy
  • the indication full spectrum is not enough, you still have to check the indication of the wavelength

As already mentioned, the plant reaches its maximum in the blue and red range. However, full-spectrum plant lamps mean that not only these two wavelength ranges are covered. Although this range is the most effective for photosynthesis, yellow and green light are also important for your plants.

With white light, you can observe your plants in natural colours and detect changes early. This enables you to take action in time.

When buying a plant lamp with full spectrum, you should therefore pay attention to the wavelength and a balanced composition. A wide spectrum is important for your plant.

Buying criteria: You can use these factors to compare and evaluate plant lamps

In the following, we would like to show you which criteria you can use to compare and evaluate plant lamps. This will make it easier for you to decide whether a particular product is suitable for you or not.

In summary, these are the following criteria:

  • Power consumption
  • Size and weight
  • Mounting type
  • Suitability for plant
  • Lifetime

In the following paragraphs you can find out what the individual purchase criteria are and how you can classify them.

Power consumption

Depending on which plant lamp you want to use, the power consumption of the corresponding lighting will play a more or less important role in your purchase decision.

You can easily calculate the power consumption yourself if you know how much power the plant lamp needs, know the operating hours per day and know the cost of a kilowatt hour at your electricity supplier!

The calculation is as follows: (power of all devices x hours per day) / 1000 x price kWh in euros = electricity consumption €/day

As an example, let's take a 25 Watt LED plant lamp, with a daily burning time of 8 hours and an electricity price of 0.25 € per kWh.

(25 Watt x 8 hours) / 1000 x 0,25€ = 0,05€/day ⇒ in the month: 1,5€ ⇒ in the year: 18,25€

Power of the plant lamp Burning time per day Cost electricity supplier Time period Total costs
15 Watt 8 hours 0,25€/kWh 1 day 0,03€
15 Watt 8 hours 0,25€/kWh 1 month 0,9€
25 Watt 8 hours 0,25€/kWh 1 day 0,05€
25 Watt 8 hours 0,25€/kWh 1 month 1,5€

You can use this example formula to calculate the electricity costs for your plant lamp and expand the table as you wish.

Size/weight

The size and weight of the plant lamp can also be decisive for you. Depending on what you need the grow light for, you will need a large or small grow light.

A large grow light can be advantageous if you want to light several plants at the same time. Plant lights that are rather small usually do not have too large a radius.

But the weight of the grow light can also be a deciding factor, because depending on how you mount it, weight may or may not be an exclusion criterion. If you already know that you want to mount the plant light on the ceiling, you must pay attention to the weight, because this is an important mounting criterion.

Basically, we can tell you that all plant lights are available in all sizes. If you want something small and light, you can just buy the light source, if you want a complete system, there is also enough choice here.

Mounting options

There are several ways to mount your plant light. You just need to consider where your plants are (indoors or outdoors) and how much light they need.

In the following, we would like to show you some of the possibilities and their possible advantages and disadvantages.

  • Ceiling mounting
  • Wall mounting
  • Table edge mounting
  • Lamp holder

You should consider which lamp is best for you and then check how it is mounted.

Ceiling mounting

If you buy a ceiling-mounted plant lamp, it usually comes with a rope and hook for construction. You must then attach this hook to the ceiling, and make sure it is strong enough, before you can hang the lamp from it!

Advantages
  • You can easily adjust the height depending on the growth phase of your plant
Disadvantages
  • Assembly is quite complex
  • not suitable for outdoor use

Wall mounting

A lamp for growing plants that is intended for the wall has some kind of wall mount. So you can simply screw this plant light on at any height.

Advantages
  • Easy mounting of the grow light
  • you do not need to drill a hole in the ceiling
Disadvantages
  • You cannot easily adjust the height of the grow light

Table edge mounting

Of course, you can also buy a plant light lamp for a single small plant, such as your desk plant. In this case, a plant lamp that is fastened to the edge of the table with a clamp is a good solution.

Advantages
  • Easy mounting of the grow lamp
  • Drilling on the ceiling or wall is not necessary
  • The plant lamp is easy to adjust
Disadvantages
  • The illumination of the lamp is focused on a small area

The plant can be illuminated enough by this type of mounting because the neck of the plant light is movable.

Lamp holder

You can, of course, buy a grow light that already fits your mounted lamp holder in the wall or on the ceiling. Then you do not have to mount another lamp socket.

Advantages
  • no extra mounting necessary
  • plant lamp can be mounted in the existing lamp holder
Disadvantages
  • no adjustment of the height or similar possible

When you buy your plant light, you only have to make sure that it fits into the lamp socket!

Suitability for which plants

As already mentioned, plant lights are available in different versions. You can use a plant lamp for any plant, but it is more worthwhile to buy one for exotic plants that require a lot of sunlight.

These plants, mostly fruits, include:

  • Lemons
  • Oranges
  • Limes
  • Figs
  • Kiwi
  • Chilli
  • Pepper
  • Aubergine

However, it is not plants with an increased sun requirement for which the purchase of a grow light is worthwhile. There are also plants for which you want to grow seeds early, such as the aubergine or chilli plant.

Basically, we would like to show you that a plant lamp is suitable for every plant, although some are more dependent on the additional light than others.

Service life

The lifespan of your plant lamp could also be important for your purchase decision.

This is especially true for an expensive grow light, as these in particular should pay for themselves in the long run. You can also recognise a high-quality plant lamp by its service life.

The life span should be at least 50,000 hours!

Together with the low electricity costs, you have made a good long-term purchase with an LED plant lamp.

Interesting facts about plant lamps

How do I build an LED plant lamp myself?

If buying a ready-made LED plant lamp is too expensive, you can build your own. Many DIY stores already have ready-made kits that are easy to assemble.

The LED plant lamp consists of 3 components, a heat sink, a driver and the LED COBs. To make the whole thing quicker and easier for you, you should order a DIY kit and then follow the instructions.

You should know that building your own LED plant light is not necessarily cheaper, but it will meet your needs exactly.

What distance does the plant lamp need?

This question is not so easy to answer because the distance depends on the power of the LED plant lamp. This refers to the photon number, i.e. the number that reaches the plant.

If the photon number is too high, your plant will suffer light burn, if it is too low, your plant will shoot out in search of light.

If the distance between the plant and the growth lamp is greater, the photon density decreases and the scattering improves. The same applies vice versa.

Depending on the type of plant, ambient light and the CO2 content of the air, as well as the temperature, the plant can utilise a corresponding amount of light. All these components only work in dependence on each other.

Image source: 123rf.com / 13299219

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