Frequently Asked Questions

Please have a look if these questions can be of help to solve your issue.

This is the list of most commonly asked questions about LED lights

LEDs and Spectra

Can I dim the luminaires?

Most lamps are dimmable.

  • C-Series, BX-Series, RX-Series & LightDNA – dimmable by default
  • L-Series, BL-Series – not dimmable
Which light spectrum comes with which luminaire?

Our luminaires are designed to fit into the growth purposes of spectra, thus each light series comes with a different set of available spectra. Information about available spectra can be found on every product’s page.

The choice of luminaire depends on the physical space you are growing plants in (greenhouse, growth chamber etc) and the choice of spectrum depends on what you are growing and in which stages.

Once you tell us where and what you are growing we will advise on the optimal luminaire and spectrum. Our expertise is based on extensive in-house and outsourced research and our spectra are suitable for most plants bred globally.

Can I change the light spectrum in the luminaire after I buy it?

No. When you place an order, luminaires with spectra inside are manufactured for you and thus not changeable later. If your application requires flexibility, please look into our LightDNA product line, which is a line of luminaires with multiple light channels in each, enabling you to re-create whichever light spectrum you may need, using a simple software interface. More information on our LightDNA’s product page.

Does the spectrum depend on the type of plant I grow?

Yes. Once you tell us what you are planning to grow our resellers or our biologists will advise you on the optimal spectrum for your particular need.

Why are your luminaires more expensive than HPS lamps?

They are not. LED technology consumes significantly less electricity and lasts much longer, thus in the long run LED grow lights are not more expensive. On top of that, LED grow lights result in better crop, further adding to your savings.

How many luminaires do I need per square meter?

The number of luminaires needed is part of a sophisticated calculation called ‘light planning’ which our resellers do for our potential clients free-of-charge. Some of the information we need for this calculation is:

  • type of plant being bred
  • surface size
  • desired output etc.

We then produce a light plan with an exact number of luminaires as well as their placement (distance from plants, density, positioning etc). This calculation is done with our proprietary light planning technology and is based on hundreds of large scale research trials.

Why are your luminaires better? There are so many LED grow lights out there...

Valoya’s technology was born out of genuine interest in sun substituting light. LED grow lights are not an extension to our main product portfolio, nor the trend we joined. LED grow lights are what we do, what we specialise in and it is an industry we helped create. One fifth of our full time staff are biologists, continuously researching the interaction between light and plants. When you acquire Valoya products, you get with them our expertise in the field of photobiology as well.

Delivery and Warranty

How long is the delivery time for lamps?

Our standard delivery time is 8 weeks. This is for products that are manufactured on order, usually BX-, BL-, RX-, and C-Series. We always have products in stock as well, thus in some cases your products may be shipped the next business day.

Why is the delivery time so long?

Our products are made from order. We only keep a small spare / sales stock of selected items.

What kind of accessories can I get with my luminaires?

Our luminaires are available with a variety of hooks and hangers, some of which come by default with your order and some which you may order separately. Please see our product brochure on the Brochures & Guides page to see all the products and accompanying accessories.

How do I know which products are in stock?

Check this information from your local Valoya reseller or the Valoya sales team. Please go to the Contact page to find your nearest reseller or to contact Valoya directly.

How long is the warranty?

We offer an up to 5-year limited warranty on all our products. See more at or contact us via email for details.

How long is the warranty?

How safe are Valoya LED lights for human health?

All Valoya LED products and spectra are tested against photobiological safety standards with the results in the “low risk” group (Risk Group 1). This means the LEDs would not be needed for a detailed workplace evaluation since there is no photobiological safety hazard issue. For more detailed information on the products, spectra and standards, please contact Mr. Harri Ekdahl (harri.ekdahl(at)

Where can I learn more about eye safety and working practice under LED grow lights?

In addition to the actual safety measurements, you can find more information about the effect of LED lights on human health here.

How long can I work under strong colored light without risking my health?

All Valoya spectra are tested for photobiological safety and are in the category of Risk Group 1. For example, the strong purple/pink light from our vernalization spectrum (G2) used in vernalization rooms may be considered unpleasant but it is not harmful to the eyes and thus working long hours in the environment using the G2 spectrum doesn’t require extra precaution. Vernalization rooms are often equipped with basic white LED fixtures that are turned on while working in the room, when G2 is turned off, allowing visual observation of the plants.

Why do the light from LEDs seems much brighter than HPS lights?

In case the same amount of electricity is used, the LED lights are brighter as the efficiency is much higher than HPS lights. An old HPS fixture may have an efficacy of around 1,5 µmol/W but a wide spectrum white LED may be closer to 3 µmol/W. Thus the total light output is almost double. Compared to HPS settings that have a pointy light source, the LEDs are typically distributed on a larger area making the brightness less apparent.

Are LED lights more harmful than HPS or the sun?

Sunlight on a bright summer day is around 2000 mmol whereas artificial greenhouse roof-lighting in production ranges from 50 to 200 µmol, so about 10 times less. Additionally, sunlight has a proportionally larger portion of UV (both UVA and UVB) while Valoya spectra only have a small amount of UVA, negligible in terms of its effect on humans, but beneficial for plant growth and development.  Our Solray385 daylight spectrum has a high CRI value (around 90) compared to HPS (around 35) making working under the lights and visual observation much more pleasant than the traditional HPS lighting. Our AP67 spectrum used in crop science has a CRI value that almost doubles the CRI value on HPS, thus allowing for a much more pleasant working environment.

I do not like the bright pinkish light, is there anything I can do?

If you feel that the light is too bright for your eyes, we recommend using sunglasses. In case you want to correct the visual color while working under specific colored LED lights, you could use sunglasses like these.

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