LED floodlight head
The fitting on its own, as a spare, a retrofit for a halide tower, or a head for a customer's own mast. Specified by flux, beam distribution and protection rating rather than by wattage.
Features
- Wattage says nothing useful about output; lumens per watt and total flux are the comparison, and good fittings sit well above 120 lm/W.
- Beam distribution decides whether the fitting lights a strip, a square or a point, and a symmetric flood is the wrong answer for a carriageway.
- Retrofitting halide towers with LED heads cuts the electrical load by roughly three quarters, but the tower's alternator then runs at very light load.
- Protection rating is needed on both the housing and the gland, and a good housing with a poor gland fails in the first winter.
- Colour temperature between 4 000 K and 5 700 K is usual on site; higher figures look brighter and raise glare complaints.
- Surge protection on the driver is what decides whether the head survives a generator-fed circuit.
Specifications
| Figure | Typical range | Unit | Why it matters |
|---|---|---|---|
| Luminous flux | 20 000 - 80 000 | lm | The only honest output comparison. |
| Efficacy | 120 - 160 | lm/W | Decides electrical load for the same light. |
| Beam distribution | symmetric / asymmetric / narrow | Must match strip, area or point lighting. | |
| Protection rating | IP 66 | Housing and gland both have to meet it. | |
| Colour temperature | 4 000 - 5 700 | K | Affects glare complaints at the same lux. |
| Surge protection level | 4 - 10 | kV | Governs survival on a generator-fed circuit. |