The Reactor 4-LED Warning Light is an extremely compact and lightweight single colour warning light, for use in tight or limited spaces.

| Flash Patterns | |||
|---|---|---|---|
| 1 | Double (2Hz) | 11 | Quint (SAE) |
| 2 | Single (2Hz) | 12 | Mega |
| 3 | Triple (2Hz) | 13 | Giga |
| 4 | Quad (2Hz) | 14 | Ultra (SAE) |
| 5 | Random | 15 | Single-Quad |
| 6 | Steady EF (Requires external flasher) | 16 | Single H/L |
| 7 | Single (SAE/CA13) | 17 | Single-Triple-Quint |
| 8 | Double (SAE) | 18 | Steady Scene |
| 9 | Triple (SAE) | ||
| 10 | Quad (SAE) |