Yield Estimator & Production Planner

Grow Room Yield Estimator

Estimate your harvest by wattage, strain, and training method — then see how under canopy lighting can boost your numbers. Need a grow room recommendation? Talk to a Grow Expert.

Open Calculator Shop LED Grow Lights

Yield Estimator

Enter your setup details. Switch to Advanced for CO₂ and environmental modifiers. Enable the Under Canopy Lighting section to see potential boost.

Grow Room Setup

Faven Chroma UC Yield Boost

Faven Chroma bars deliver 500–800 µmol directly to lower bud sites overhead lights can't reach. Over 85% of Faven customers report a 1-run ROI. Enter your setup above and calculate to unlock your personal boost estimate.

✦ Faven Chroma
🔒 Calculate your yield above to unlock your personalized Faven Chroma boost estimate.
Add Faven Chroma UC Bars 120W + 15W far-red per bar · 2.9 µmol/J · IP66

⚠️ Yield estimates are for planning purposes only. Actual results vary significantly based on genetics, environment, pest/disease pressure, and grower execution. Under canopy boost percentages are based on Faven-reported customer data — individual results will vary. Always test with a single bar before scaling.

How to use this calculator
  1. Enter your total LED wattage — use actual wall-draw watts from your fixture spec sheet, not advertised watts.
  2. Select your strain type — Indica, Sativa, Hybrid, or Autoflower. Each has a genetic yield modifier applied to the base g/W calculation.
  3. Choose your training method — SCROG and SOG maximize canopy efficiency and apply the highest yield multipliers.
  4. Switch to Advanced to add CO₂ enrichment, VPD quality, and grower experience modifiers for a more precise estimate.
  5. Unlock the Faven Chroma section by clicking Calculate — toggle it on, set canopy coverage %, and choose your far-red finish option to see your personalized yield boost.
  6. Click Calculate — your estimated yield, timeline, and under canopy boost appear instantly.

Formula: Base yield = (watts × 1.1 g/W) × strain × training × CO₂ × VPD × skill. UCL boost = base yield × coverage-weighted boost modifier.

📅 Grow Cycle Timeline — Veg · Flower · Dry · Cure Timeline ▾
Vegetative
Flowering
Drying
Curing

Timeline updates when you Calculate. Weeks are drawn from your inputs (default: 4 wk veg · 9 wk flower · 1 wk dry · 2 wk cure). Switch to Advanced → Cycle & Timing to customize. When Faven far-red finish reduction is selected, a 5th row appears showing the compressed flowering cycle side-by-side with the baseline.

Under Canopy Lighting — Expected Yield Boost by Light Type & Coverage
Light Type Best Stage Coverage 25% Coverage 50% Coverage 75–100% Additional Benefit
Full-Spectrum LED Bars Full cycle +5–8% +10–14% +16–20% Broad photosynthetic coverage, bottom bud development
UVA / UV Bars Late flower (last 4–6 wk) +4–6% +8–12% +14–18% Increased trichome & resin production, potency boost
Far-Red Bars Flower only +3–5% +6–9% +10–12% Emerson effect, faster finish (−3 to −5 days/cycle)
Full-Spectrum + Far-Red Full cycle +8–12% +15–20% +20–25% Maximum photosynthetic efficiency + faster ripening
No under canopy lighting — Baseline yield (overhead lights only) Lower canopy bud sites underdeveloped, larfy buds common

Frequently Asked Questions

How many grams per watt should I expect from a well-dialed LED grow?
A well-dialed LED grow with good genetics, proper VPD, and basic training typically produces 1.0–1.5 g/W. The calculator uses 1.1 g/W as a realistic starting benchmark. Beginners often see 0.5–0.8 g/W while learning environmental control. Expert growers running CO₂ enrichment, dialed VPD, and SCROG training can push 1.5–2.0+ g/W. Use the Advanced modifiers to pull the estimate closer to your actual setup.

Does Faven Chroma under canopy lighting actually increase yield?
Yes — consistently. Overhead lights lose intensity past the top 12–18 inches of canopy, leaving lower bud sites starved for PAR. Faven Chroma bars deliver 500–800 µmol directly to those sites from below. Faven reports 20–30%+ yield increases across 800+ installations, with over 85% of customers achieving a 1-run return on investment. The Chroma's independent far-red channel also cuts 5–7 days off flowering cycles, adding extra harvests per year.

How many Faven Chroma bars do I need for my grow?
Faven's own sizing formula: convert your bench length to inches, then divide by 46" (the bar length) to get the number of bars per row. Each bench needs at least one power cord, and bars can be daisy-chained end-to-end. For spectrum and far-red control, the CX2 controller handles up to 100–150 bars. Use our standalone UCL Calculator to size your full setup.

What training method gives the highest yield per watt?
SCROG (Screen of Green) consistently delivers the highest g/W by spreading the canopy flat and ensuring every bud site gets equal light intensity. It applies a 1.25× multiplier in this calculator. SOG (Sea of Green) maximizes cycles per year with shorter veg time — better if you're optimizing annual output over per-cycle yield. LST is the easiest method for beginners and still adds a meaningful 1.15× boost over untrained plants.

Why does the far-red channel on the Faven Chroma speed up flowering?
Far-red light (700–750nm) triggers the Emerson enhancement effect, making photosynthesis more efficient when combined with red wavelengths. It also signals plants to accelerate flowering and ripening. The Chroma's independent 15W far-red channel can be scheduled separately from the main spectrum — Faven recommends running R8–R9 spectrum with far-red during weeks 8–9 of flower. Growers following Faven's protocol report 5–7 days faster harvests, which compounds into extra cycles over the year.

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