Quick Table (Standard Brightness)

Assumes 33 ft / 100 LEDs mini strings for typical indoor trees.

Tip: Using 66 ft / 200 LED strings? Divide the quantity above by ~2 (round up) for a similar look.

Pick Your Brightness (15/30/45)

• Minimal: 15 ft × tree height (soft ambience, most power-saving)
• Standard (Recommended): 30 ft × tree height (balanced shine, great in photos)
• Lush: 45 ft × tree height (layered sparkle, statement look)

Sparse branches or trunk-to-tip wrapping? Choose Lush. Dense foliage and “just enough” glow? Choose Minimal.

Spiral-Length Formula (For Precision)

1. Bottom diameter D_bottom (ft); top diameter D_top (ft, often 0.8–1.2)
2. Vertical pitch between wraps Pitch (ft, often 0.4–0.6)
3. Number of wraps ≈ Tree Height / Pitch
4. Average circumference ≈ π × (D_bottom + D_top) / 2
5. Total light length (ft) ≈ Average circumference × Number of wraps

Example (7.5 ft tree): D_bottom=3.5, D_top=1, Pitch=0.5 → wraps=15; average circumference≈7.07 ft; total≈106 ft ≈ 4×33 ft (≈400 LEDs), i.e., minimalist to low-standard coverage.

Bulb Types & Visual Adjustments

• 5mm/M5/T5 minis: Use table as-is (100% length)
• C6/C7: larger points → reduce total length by ~20–30%
• C9 classic: bold presence → reduce by ~30–40%
• Ribbon/net/curtain: wide coverage → often 15–25% less on trees

Indoor/Outdoor & Safety

• Outdoor trees: add ~10–20% length for “stand-back” viewing.
• Max series run: follow the product label strictly.
• Power & protection: choose UL/ETL-listed, outdoor-rated strings; use weather-safe connectors and timers.
• Storage: wind on reels and label by section for tangle-free reuse.

FAQ

How many feet for a 7.5 ft tree?

Minimal ≈ 112–120 ft (4×33 ft ≈ 400 LEDs); Standard ≈ 225 ft (7×33 ft ≈ 700 LEDs); Lush ≈ 338–345 ft (11×33 ft ≈ 1100 LEDs).

How many feet for a 9 ft tree?

Minimal ≈ 135 ft (5×33 ft ≈ 500 LEDs); Standard ≈ 270 ft (9×33 ft ≈ 900 LEDs); Lush ≈ 405 ft (13×33 ft ≈ 1300 LEDs).

Using C9 bulbs?

They’re larger and brighter per point. Reduce total length by ~30–40% vs. minis for a similar visual density.

Simple universal rule?

Total feet ≈ tree height (ft) × 30 for standard brightness. Go ×45 for lush; ×15 for minimal.

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