Værktøj til indendørs dyrkning
Dyrkningslys Beregner
Beregn anbefalet dyrkningslyseffekt, målværdi for PPFD, antal armaturer og DLI til hydroponik, dyrknings telte og indendørs haver.
Enter the size of your grow space floor area.
Choose square meters or square feet.
Different growth stages need different light intensity.
Enter your current fixture wattage to estimate how many lights you need.
Recommended grow light products
LED dyrkningslys
Et passende armatur til dette dyrkningsopsætning, med balanceret output til dækning af baldakinen og effektiv indendørs dyrkning.
Length of the grow area.
Width of the grow area.
Choose meters or feet.
Sets target PPFD range.
Typical efficient LED fixtures are often in the 2.3–3.1 µmol/J range.
Used to estimate how many fixtures are needed.
Accounts for real-world losses from fixture spread, height, and room conditions.
Needed for DLI estimation from your target PPFD.
Recommended fixtures for this setup
LED dyrkningslys
Et passende armatur til dette dyrkningsopsætning, med balanceret output til dækning af baldakinen og effektiv indendørs dyrkning.
Average PPFD at canopy level in µmol/m²/s.
How many hours the lights are on per day.
Used to compare your DLI with typical stage targets.
Products to optimize lighting
LED dyrkningslys
Et passende armatur til dette dyrkningsopsætning, med balanceret output til dækning af baldakinen og effektiv indendørs dyrkning.
Grow light calculator for hydroponics and indoor growing
This grow light calculator helps indoor growers estimate the right LED grow light wattage, fixture count, target PPFD, and daily light integral for tents, grow rooms, hydroponic systems, and indoor gardens. It is useful for seedlings, vegetative growth, flowering plants, fruiting crops, and general indoor cultivation.
Use the calculator to estimate how much light your grow area needs, compare fixture sizes, and plan more efficient lighting coverage for better canopy development and more consistent plant growth.
How this grow light calculator works
The calculator estimates lighting needs based on grow area and plant stage. In advanced mode, it also uses fixture efficacy and a real-world coverage factor to estimate how much total light output and wattage are needed for your space.
Because real grow rooms are not perfect, the coverage factor adjusts for losses caused by hanging height, spread, layout, and room conditions.
What each parameter means
- Grow area: total canopy floor area that needs light coverage.
- Plant stage: growth phase, which changes target light intensity.
- PPFD: photosynthetic photon flux density at canopy level.
- PPF: total light output of the fixture in µmol/s.
- Fixture efficacy: how efficiently a grow light converts watts into usable photons.
- Coverage factor: practical adjustment for real-world lighting losses.
- DLI: total usable light plants receive per day.
- Light hours per day: photoperiod used to calculate DLI.
Typical target PPFD by growth stage
- Seedling / clone: gentle light levels, typically around 100–300 µmol/m²/s.
- Vegetative stage: moderate light levels, typically around 300–600 µmol/m²/s.
- Flowering / fruiting: stronger light levels, typically around 600–900 µmol/m²/s.
These are practical general-use targets. Final intensity depends on crop type, cultivar, environment, CO₂ level, fixture design, and grower strategy.
How to calculate DLI
The DLI formula is:
DLI helps growers understand the total daily light plants receive, not just momentary light intensity. This is useful when comparing different photoperiods, dimming strategies, and growth stages.
Best practice for indoor growers
- Match light intensity to plant stage.
- Keep fixture height consistent across the canopy.
- Use DLI, not only wattage, when evaluating lighting strategy.
- Check real canopy PPFD with a PAR meter if possible.
- Combine strong lighting with proper climate, nutrients, irrigation, and airflow.
Forsendelse. 3 dages EU-levering
7 til 15 EUR under 30 kg. Se mere på Forsendelsesdetaljer side.
60 dages returretur
Du kan få refusion eller erstatning op til 30 dage efter købet.
Men vi står normalt på kundens side, så vi kan give en tidsramme på 60 dage!
2 måneders ekspertstøtte efter salg
Det er gratis.
Vi er et team på 10 med et årtis erfaring inden for dyrkning og havebrug, så hvis du har brug for hjælp, vil vi guide dig til dit mål inden for 2 måneder efter købet.
Om os. Vores 9 års historie
GoToGarden startede i 2017 ud af personlig frustration. Vores grundlægger var en hobbydyrker, der brugte timer på at navigere på onlinebutikker, der føltes bygget af folk, der aldrig havde rørt en plante — rodede layouts, vage produktbeskrivelser, ingen reel vejledning om, hvad man skulle købe, eller hvorfor. Han vidste, at der måtte være en bedre måde.
Se mere på Om os side
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