Photometric Data Sheet
| Luminaire | Surface Square - Ceiling Surface Lights, 36 deg | Lamp / LED | Integrated LED module |
|---|---|---|---|
| Luminous flux | 1,440 lm | Input power | 12.0 W |
| Efficacy | 120.0 lm/W | CCT | |
| CRI | >90 | UGR | <19 |
| Beam angle (50% Imax) | 36.0° | Field angle (10% Imax) | 59.4° |
| Voltage |
| Distribution | Direct, rotationally symmetric | Maximum intensity | 3,705.0 cd |
|---|---|---|---|
| At angle | 0° V | Luminous shape | Circular |
| Luminous size | 170 mm dia. | Spacing/height (nominal) | 1.14 |
Polar distribution, rotationally symmetric. 0° is straight down.
| Zone | Lumens | % of total |
|---|---|---|
| 0–30° | 1,345 | 93.4% |
| 0–60° | 1,440 | 100.0% |
| 0–90° (total) | 1,440 | 100.0% |
Flux emitted within each downward cone. 59% of the total falls inside the rated beam angle.
Centre-beam illuminance and beam diameter on a surface directly below.
| γ | cd | γ | cd |
|---|---|---|---|
| 0° | 3,705.0 | 46° | 5.1 |
| 1° | 3,702.5 | 47° | 3.6 |
| 2° | 3,691.9 | 48° | 2.5 |
| 3° | 3,670.3 | 49° | 1.7 |
| 4° | 3,636.2 | 50° | 1.2 |
| 5° | 3,588.2 | 51° | 0.8 |
| 6° | 3,525.6 | 52° | 0.5 |
| 7° | 3,448.1 | 53° | 0.0 |
| 8° | 3,355.8 | 54° | 0.0 |
| 9° | 3,249.0 | 55° | 0.0 |
| 10° | 3,128.6 | 56° | 0.0 |
| 11° | 2,995.5 | 57° | 0.0 |
| 12° | 2,851.2 | 58° | 0.0 |
| 13° | 2,697.3 | 59° | 0.0 |
| 14° | 2,535.7 | 60° | 0.0 |
| 15° | 2,368.3 | 61° | 0.0 |
| 16° | 2,197.3 | 62° | 0.0 |
| 17° | 2,024.6 | 63° | 0.0 |
| 18° | 1,852.5 | 64° | 0.0 |
| 19° | 1,682.9 | 65° | 0.0 |
| 20° | 1,517.6 | 66° | 0.0 |
| 21° | 1,358.3 | 67° | 0.0 |
| 22° | 1,206.5 | 68° | 0.0 |
| 23° | 1,063.3 | 69° | 0.0 |
| 24° | 929.7 | 70° | 0.0 |
| 25° | 806.4 | 71° | 0.0 |
| 26° | 693.7 | 72° | 0.0 |
| 27° | 591.8 | 73° | 0.0 |
| 28° | 500.7 | 74° | 0.0 |
| 29° | 419.9 | 75° | 0.0 |
| 30° | 349.2 | 76° | 0.0 |
| 31° | 287.8 | 77° | 0.0 |
| 32° | 235.1 | 78° | 0.0 |
| 33° | 190.3 | 79° | 0.0 |
| 34° | 152.6 | 80° | 0.0 |
| 35° | 121.3 | 81° | 0.0 |
| 36° | 95.5 | 82° | 0.0 |
| 37° | 74.5 | 83° | 0.0 |
| 38° | 57.5 | 84° | 0.0 |
| 39° | 44.0 | 85° | 0.0 |
| 40° | 33.3 | 86° | 0.0 |
| 41° | 25.0 | 87° | 0.0 |
| 42° | 18.6 | 88° | 0.0 |
| 43° | 13.6 | 89° | 0.0 |
| 44° | 9.9 | 90° | 0.0 |
| 45° | 7.2 |
Candela at each vertical angle, C0-C180 plane.
| Mounting height | centre | 0.5 m | 1.0 m | 1.5 m | 2.0 m | Beam Ø |
|---|---|---|---|---|---|---|
| 2.0 m | 926 | 577 | 114 | 10 | 1 | 1.3 m |
| 2.5 m | 593 | 445 | 158 | 29 | 4 | 1.6 m |
| 3.0 m | 412 | 341 | 169 | 51 | 11 | 1.9 m |
| 3.5 m | 302 | 265 | 160 | 66 | 20 | 2.3 m |
| 4.0 m | 232 | 210 | 144 | 73 | 28 | 2.6 m |
Horizontal illuminance directly below the fitting (centre) and at each radial offset, for a single fitting. Use it to judge spacing for uniform light. Point-source projection, E = I·cosθ / D².