LED Flood Light Questions Answered: Dual Head, Dimmable, Indoor and Landscape Use
Answers to common LED flood light questions: dual head vs single, dimmable floods, indoor use, landscape use, low voltage vs mains, and 100 W LED vs old floods.
Key points
- Dual head floods aim light in two directions from one fixing point; one larger single flood gives more even light over one area.
- Dimmable floods need a compatible driver and dimmer (0–10 V, DALI or phase-cut); they suit sports, facades and landscape scenes.
- LED floods can be used indoors in high spaces such as warehouses, halls and stages, but need glare control.
- A 100 W LED flood typically replaces a 250–400 W halogen or metal halide flood, with instant start and longer life.
LED floodlights are used for everything from a back yard to a stadium, so buyers ask many of the same questions. Here are clear answers to the most common ones, with links to deeper guides.
Dual head or single head?
| Dual head | Single head | |
|---|---|---|
| Directions | Two, independently aimed | One |
| Use | Building corners, driveway + door, yard + path | One area |
| Wiring | One junction box | One junction box |
| Even light over one area | Less | Better |
| Typical power | 2 × 15–50 W | 30–300 W |
Dual and triple head floods are popular for homes and small buildings. For commercial yards and car parks, single heads with the right optics give more control.
Dimmable LED floods
Dimmable floods let you set scenes and save energy:
- 0–10 V or DALI: commercial sites, sports fields, facades
- Phase-cut (TRIAC): some residential floods with compatible dimmers
- Built-in programmable dimming: schedules without control wiring
Uses: sports facilities (training vs match), facade and monument lighting, car parks dimmed after midnight, landscape scenes. Check driver and dimmer compatibility; mismatches cause flicker.
Can LED floods be used indoors?
Yes, where ceilings are high or long throw is needed:
- Warehouses and logistics centres with high racks
- Sports halls and arenas
- Stages, exhibition halls and atriums
- Factory bays with cranes
Indoors, floods must not shine into eyes. Use visors, narrow beams and high mounting. For general warehouse lighting, high bays are usually more comfortable.
Indoor vs outdoor floods
| Outdoor floods | Indoor floods | |
|---|---|---|
| IP rating | IP65–IP66 | IP20–IP54 often enough |
| Surge protection | Important | Less critical |
| Glare control | For neighbours and roads | For occupants |
| Typical mounting | Poles, walls, roofs | Trusses, walls, ceilings |
An outdoor flood works indoors; an indoor-only flood should not be used outside.
Floods for landscape lighting
Small, warm-white floods with wide beams wash walls, hedges and lawns; narrow spots light trees and statues. Our landscape spotlights and floodlights offer 15° to 120° beams and an angle scale for aiming. See landscape lighting ideas for techniques.
Low voltage or mains?
- Low voltage (12 V): safe for gardens, easy to move; needs a transformer and short runs
- Mains (100–277 V): commercial floods, long runs, higher power
Efficiency depends on the LED and driver, not the voltage. See low voltage landscape lighting for when 12 V makes sense.
100 W LED vs traditional floods
| Old flood | LED replacement |
|---|---|
| 500 W halogen | 50–80 W LED |
| 250 W metal halide | 80–100 W LED |
| 400 W metal halide | 100–150 W LED |
Benefits: instant start, no warm-up after power cuts, 3–5 times less energy, 50,000+ hour life, better colour. For other sizes, see the LED flood light wattage guide.
Security and decoration from one flood?
Yes, with the right controls:
- Dusk-to-dawn at low level for decoration or orientation
- Motion-triggered full output for security
- RGB or tunable white for events
See solar motion detector lights for how motion modes work.
Choosing wattage
A quick guide by mounting height:
| Height | Typical LED flood |
|---|---|
| 3–4 m | 20–50 W |
| 5–6 m | 50–100 W |
| 8–10 m | 100–200 W |
| 12–15 m | 200–400 W |
| 20 m+ | 400–1,000 W, narrow beams |
Waterproofing
Outdoor floods should be IP65 or IP66 with sealed cable glands and breather valves. See waterproof outdoor LED flood lights.
Brightest LED floods
High-lumen floods for stadiums and ports reach 130,000–200,000 lumens from 1,000–1,500 W. Our heat-pipe stadium and port floodlights cover 200–1,500 W.
Colour temperature for floods
For security and car parks, 4000–5000K white light gives good visibility and works well with cameras. For homes, gardens and hotels, 3000K feels warmer and less harsh. Facades are lit to suit their materials: warm white for brick and sandstone, neutral or cool white for glass, steel and white render. Sports floods are usually 5000–5700K with good colour rendering for players and cameras.
Beam angles
Beam angle decides where the light goes as much as wattage does. Wide beams (100–120°) suit yards and walls close to the fixture. Medium beams (60°) suit car parks and building faces from a distance. Narrow beams (15–40°) are used for tall facades, flag poles, sports fields and high masts. Choosing the right beam often allows a lower wattage.
Maintenance
LED floods need little attention: clean the glass once or twice a year, check aiming after storms and inspect cable glands and seals. Keep a few spare drivers for large installations so failures can be fixed quickly.
Flood or area light?
Floodlights throw a beam that you aim; area lights (shoebox or street-light style) spread light in a rectangle under the fixture with a sharp cut-off. For car parks and roads, area lights give more even light with less glare. For facades, signs, sports and yards lit from a wall or mast, floods are the better tool. Many sites use both: area lights on poles and floods on buildings.
Mounting and aiming
Mount floods high enough that the beam reaches the far side of the area at a moderate angle, and aim them so the brightest part of the beam does not point at roads or windows. Use the angle scale on the bracket where available, and lock the bracket after aiming at night.
Ordering
Tell us the area, mounting heights and whether you need dimming, sensors or colour. We will suggest flood types, wattages and optics.
Sources
Frequently asked questions
What are the advantages of dual head LED flood lights?
They light two directions from one mounting point, such as both sides of a building corner or a driveway and a door, with one junction box and one sensor. For lighting one area evenly, a single larger flood is often better.
Can LED flood lights be used indoors?
Yes, in high spaces such as warehouses, sports halls, theatres and atriums, often with narrow or medium beams. Use glare shields and place them so people do not look directly into them.
Are low voltage LED flood lights more energy-efficient?
Not by themselves. Efficiency depends on the LED and driver, not the supply voltage. Low voltage (12 V) floods are used for safety and convenience in gardens, but transformers add some losses.