Gravity42 4x2 Module 120 Watt 400x200x10mm
Gravity42 4x2 Module 120 Watt 400x200x10mm
Eight clusters across 40 centimeters. The GRAVITY 42 was built for large reef landscapes — for Tridacna directly under the surface and SPS colonies that truly need light. No cooling fan. No noise. Just light.
GRAVITY 42 · 120 W · 4×2 · 400 × 200 × 10 mm
Technical Data
| Model / SKU | GRAVITY 42 · 10168 |
| Cluster power | 16 W per cluster (fixed, DPC) |
| System power | 120 W · 4×2 · 8 Cluster |
| Dimensions | 400 × 200 × 10 mm |
| Power supply | DC 24 V |
| Luminous flux | ~3,752 lm |
| PPF 400–700 nm | ~185.3 µmol/s |
| PPE | 1.54 µmol/J |
| LED Optics | 60° High Power + 120° Mid Power |
| Color rendering | CRI 97 · no cyan gap |
| Tilt | ±20° ball joint · 360° |
| Cooling | Passive · silent · >50,000 h |
| Protection class | IP69 (luminaire) · IP68 (power supply) |
| Control | b.CON · WLAN/AP + Cloud · DPC |
5-Channel Spectrum
Dynamic Power Control (DPC) — all 5 channels independently dimmable. The system power remains constant at 120 W, regardless of the spectrum mix.
| Channel | Wavelength | Note |
|---|---|---|
| CH 1 · White + UV-A | 6,500 K + 390 nm | CRI 97 |
| CH 2 · Royal Blue | 460 nm + 440 nm | 99.3% purity |
| CH 3 · Actinic | 420 nm + 400 nm | 99.6% purity |
| CH 4 · Pink | ~559 nm | – |
| CH 5 · Cyan | 480 nm | 89.5% purity |
PAR · PUR · LUX
PPF (µmol/s) is the total light flux of the luminaire — photons per second, independent of distance or area. High PPF does not automatically mean high PAR in the tank.
PAR (µmol/m²/s) is the area measurement at a tank position. PAR decreases with depth. The LiST Tool calculates the optimal configuration.
PUR weights PAR according to the absorption curve of zooxanthellae. Blue 430–480 nm is weighted more heavily — where corals absorb most efficiently.
LUX measures brightness for the human eye — biologically irrelevant for corals, but useful for visual tank assessment.
Full load 100% · directly under luminaire center · 20 cm mounting height
| Depth | PAR | PUR | LUX |
|---|---|---|---|
| 0 cm | ~2400 | ~1944 | ~48,000 |
| 10 cm | ~1540 | ~1247 | ~30,800 |
| 20 cm | ~990 | ~802 | ~19,800 |
| 30 cm | ~570 | ~462 | ~11,400 |
| 40 cm | ~350 | ~284 | ~7,000 |
| 50 cm | ~215 | ~174 | ~4,300 |
| 60 cm | ~135 | ~109 | ~2,700 |
| 70 cm | ~87 | ~70 | ~1,740 |
| 80 cm | ~56 | ~45 | ~1,120 |
PAR-Orientation by Species
| Species | Min | Optimal | Max |
|---|---|---|---|
| Soft Corals | 30 | 50–150 | 200 |
| LPS Corals | 50 | 100–250 | 350 |
| SPS Corals | 150 | 200–400 | 600 |
| Tridacna derasa/squamosa | 150 | 250–450 | 600 |
| Tridacna maxima/crocea | 250 | 250–450 | 700 |
µmol/m²/s · by species and depth · LiST Tool
