Library · Light & photoperiod

Grow Light Studio.

By · Free, in your browser

What this is
Studio
Domain
Light & photoperiod
Cost
Free — no account
Use
In the browser, or embed

Grow Light Studio

Pick a fixture and a room, and see the whole picture at once — canopy PPFD and uniformity, DLI, crop fit, and what it costs to run. One config, every answer.

1 · The fixture

Specs you enter are treated as manufacturer-claimed. A quantum sensor at the canopy is the real measurement.

2 · The room & the crop

Blank = auto-design for the crop's DLI target
Your utility price — same for any fixture
Sets the DLI target band
Fixtures needed—— grid
Avg canopy PPFD—μmol/m²/smodeled
Uniformity (min/avg)—%—
DLI delivered—mol/m²/d
Crop fit——
System power draw—Wall fixtures · this is what you pay for
Daily energy cost$——
Cost per mol (PAR)$—lower = more light per dollar
Total system PPF—μmol/s

Canopy PPFD heatmap

Modeled canopy-level light across the room (extended-source cosine estimate). Brighter = more light; dim corners and seams show where uniformity drops. Uniformity (min/avg, ASABE S640) is measured over the canopy zone; reflective walls lift the edges further. Hang height changes how evenly light spreads (uniformity), not the average intensity — in an enclosed space the photons all reach the canopy, so to lower the overall light level use fewer or dimmer fixtures, not more height.

dimbright

What the Studio is doing

It ties the separate light tools together so you can see how one decision moves the others. By default it designs the number of fixtures to hit your crop's DLI target — add more and you over-light (wasted energy and light stress), use fewer and growth slows. Override the count to explore. The Studio computes all of it from one fixture and one room:

  • PPFD & uniformity — the same extended-source cosine model as the Coverage Layout Designer: each fixture spreads its photons over its footprint, and the model sums them across the canopy.
  • DLI — average PPFD across your photoperiod, the way the DLI Calculator does it.
  • Crop fit — your DLI against the target band for the crop and stage. Under-target means slow growth; well over means wasted energy and light stress.
  • Energy — what the fixtures draw over the photoperiod, and the cost to deliver a mole of light, the way the Cost-per-DLI tool frames it.

On the numbers

Specs from a catalog fixture are labeled by where they came from — manufacturer-claimed, or DLC lab-verified. Either is a planning estimate. The honest measurement is a quantum sensor (Apogee, Bluelab) read at the canopy, at several points, because the heatmap above is exactly the kind of unevenness a single center reading hides.

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Free under CC BY 4.0. Cite as "OAT Grow Light Studio (openagriculturetechnology.com)".