SF 660D ECO
Single-channel full-spectrum workhorse
Factory-direct pricing. Send your room size and target PPFD for a layout recommendation with the quote.
- Input power
- 660 W
- Flowering footprint
- 4ft x 4ft
- Ingress protection
- IP65
What we measured
The three artifacts a lighting plan is actually drawn from. Every figure below comes off our own spec sheet; where we do not have a measurement, the page says so instead of estimating.
Coverage & PPFD
Rated flowering footprint, 4 × 4 ft. Both readings are µmol/m²/s measured 1 ft from canopy (mounting range 6-24 in). The shading illustrates centre-to-edge falloff; it is not a measured grid. A full PPFD map at your mounting height comes with the quote.
1-channel spectrum
Full balance spectrum - Samsung LM281B white + 450nm blue + 660nm deep red (no UV or far-red channel).
Download the full spec sheet (PDF)What the SF 660D ECO is for
The entry point to the foldable range. 1,848 µmol/s over 4ft × 4ft, single dimmer, fixed full-balance spectrum with no UV or far-red channels. A 539 µmol/m²/s canopy average suits vegetative rooms, mother stock and unenriched flower rooms, and it brings the range's LED engine and five-year term to the lowest wattage in the family. 990W HPS replacement.
What you get
- 1,848 µmol/s, 660W at 277VAC, 539 µmol/m²/s average PPFD at 12 inches.
- Fixed full-balance spectrum: 2,226 diodes, Samsung LM281B full spectrum plus 660nm deep red.
- Single-channel dimming 0-100%, at the knob or over RJ12 group control.
- 4ft × 4ft flowering, 5ft × 5ft vegetative coverage, 120° beam.
- AC 110-277V, 2.38A at 277V — the lowest per-fixture current in the range. UL-listed driver.
- Passive cooling to 40°C ambient; IP65, flicker-free.
- Folds flat: 1120 × 1120 × 50 mm open, 13.12 kg; ships one per carton at 1135 × 615 × 130 mm, 15.24 kg gross.
- Five-year standard warranty, L90 beyond 50,000 hours.
What it looks like in use
Over a commercial flowering bench
Installed in a working commercial grow. Rated coverage: Flower 4ft x 4ft; Veg 5ft x 5ft.
GC001 touchscreen
Schedules, per-channel levels, and live temperature, humidity and VPD — one controller runs up to 100 fixtures over RJ12.
Choose your model
| Model | Power | Avg PPFD @ 1 ft | |
|---|---|---|---|
| SF 880D ECO | 880 W | 719 µmol/m²/s | View → |
| SF 660D ECO | 660 W | 539 µmol/m²/s | this page |
Specifications
- Factory model
- LH-DF46-660
- Power
- 660 W
- Spectrum
- Full spectrum (Samsung LM281B) + 660nm deep red
- Control channels
- 1
- Coverage
- Flower 4ft x 4ft; Veg 5ft x 5ft
- Input voltage
- AC 110-277V
- Dimming
- Single channel, full spectrum; RJ12 port for group control
- Dimensions
- 1120 x 1120 x 50 mm
- Weight
- 13.12 kg
- IP rating
- IP65
- Rated lifetime
- 50,000 h
- Warranty
- 5 years
Engineering data
- Replaces
- 990W HPS/MH
- Average PPFD @ 1 ft
- 539 µmol/m²/s
- Centre PPFD @ 1 ft
- 710 µmol/m²/s
- Diode brands
- Samsung LM281B + 660nm
- Diode count
- 2226 pcs
- Beam angle
- 120 deg
- Mounting height
- 6-24 in
- Thermal management
- Passive
- Max ambient
- 40 °C
- Power factor
- ≥ 0.95
- Driver
- UL-listed driver
- Ratings
- Flicker-free, damp-location, dimmable, IP65
- Form factor
- Foldable, ships flat
- Packing
- 1 pc/carton, 1135 x 615 x 130 mm, 15.24 kg gross
Models in this range
| Model | Factory model | Power | Size | Diodes | Net weight | Gross weight | Packing |
|---|---|---|---|---|---|---|---|
| SF 660D ECO | LH-DF46-660 | 660-720 W | 1120 x 1120 x 50 mm | 2226 pcs | 13.12 kg | 15.24 kg | 1135 x 615 x 130 mm |
| SF 880D ECO | LH-DF46-880 | 720-880 W | 1120 x 1120 x 50 mm | 2968 pcs | 14.17 kg | 16.35 kg | 1135 x 615 x 130 mm |
| SF 1000D ECO | LH-DF46-1000 | 880-1000 W | 1120 x 1120 x 50 mm | 3710 pcs | 15.61 kg | 17.86 kg | 1135 x 615 x 130 mm |
Current draw by supply voltage
What the circuit is sized from when you plan how many fixtures share a breaker.
- 110Vac 6.0A
- 120Vac 5.5A
- 220Vac 3.0A
- 240Vac 2.75A
- 277Vac 2.38A
PPFD distribution maps available with your quote.
Before you spec it
Where does the SF 660D ECO belong in a facility?
Veg rooms, mother rooms and propagation, where the intensity target sits well below flowering. Its 539 µmol/m²/s average is close to a typical vegetative setpoint at full output, which means the fixture runs near its design point rather than dimmed down to a third.
Should I use it for flowering?
It will flower a 4ft × 4ft bench, but at 539 µmol/m²/s you are below where most enriched rooms want to be. If flowering is the job, the SF 880D ECO puts 719 µmol/m²/s over the same footprint for 220W more.
How many fit on a circuit?
2.38A at 277V, 5.5A at 120V. On a 277V branch this is the easiest fixture in the range to lay out, which is part of why it is common in high-density veg rooms.
Can I mix it with PRO fixtures on one controller?
Yes — one RJ12 interface across the whole range. A GC001 can run SF fixtures in a veg zone and three-channel TF fixtures in flower, on separate schedules, up to 100 fixtures total.
