Lighting
5 entries on file.
- №0012026-05-19
How Many Watts of Grow Light Per Plant? A Sizing Guide That Uses Real Numbers
Wattage is the wrong unit, but everyone shops by it. Here's how to translate watts into PPFD, DLI, and actual photons that grow plants — for lettuce, basil, tomato, and more.
- №0022026-05-19
Light Spectrum for Hydroponics — What Each Color Actually Does
Blue grows compact leaves, red drives flowering, far-red controls stretch, green penetrates the canopy. A practical breakdown of spectrum without the marketing claims.
- №0032026-05-19
Lighting for Seedlings and Microgreens — Low PPFD, High Stakes
Seedlings need less light than people think; microgreens need more than people think. Both fail badly with the wrong fixture. Practical PPFD targets, distance, and what to buy.
- №0042026-05-19
Photoperiod and Flowering — How Day Length Controls What Your Plants Do
Plants don't measure daylight — they measure darkness. Short-day, long-day, and day-neutral plants react to photoperiod in opposite ways. Get the schedule wrong and you'll never flower a tomato or strawberry.
- №0052026-05-19
PPFD, DLI, and PAR — Hydroponic Lighting Explained
PPFD is light intensity, DLI is daily total, PAR is the wavelength range plants use. This guide turns confusing acronyms into actionable numbers for every crop.
Frequently asked
- How much light do hydroponic plants need?
- It is measured as DLI, the total light per day. Lettuce does well around DLI 14; fruiting crops need more. Each plant profile lists its DLI.
- What is the difference between PPFD and DLI?
- PPFD is light intensity at a moment (μmol/m²/s); DLI is the total over a day (mol/m²/day). DLI depends on both PPFD and how many hours the light is on.
- How far should a grow light be from plants?
- It depends on the light’s wattage and the crop. The light distance calculator gives a starting height for your fixture.