Photometric Data Sheet
| Luminaire | ROMA I - Ceiling Surface Lights, 35 deg | Lamp / LED | Integrated LED module |
|---|---|---|---|
| Luminous flux | 1,440 lm | Input power | 12.0 W |
| Efficacy | 120.0 lm/W | CCT | |
| CRI | >90 | BUG rating (TM-15-11) | B2-U0-G0 |
| Beam angle (50% Imax) | 35.0° | Field angle (10% Imax) | 57.7° |
| Voltage | AC220~240V |
| Distribution | Direct, rotationally symmetric | Maximum intensity | 3,916.0 cd |
|---|---|---|---|
| At angle | 0° V | Luminous shape | Circular |
| Luminous size | 70 mm dia. | Spacing/height (nominal) | 1.10 |
Polar distribution, rotationally symmetric. 0° is straight down.
| Zone | Lumens | % of total |
|---|---|---|
| 0–30° | 1,360 | 94.5% |
| 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.
| Zone | Back lm | Front lm |
|---|---|---|
| Low 0–30° | 680 | 680 |
| Mid 30–60° | 40 | 40 |
| High 60–80° | 0 | 0 |
| Very high 80–90° | 0 | 0 |
| Uplight 90–100° / 100–180° | 0 / 0 | |
Backlight, Uplight and Glare classes from the zone lumens, IES TM-15-11 limits. Calculated from this distribution.
Centre-beam illuminance and beam diameter on a surface directly below.
| γ | cd | γ | cd |
|---|---|---|---|
| 0° | 3,916.0 | 46° | 3.4 |
| 1° | 3,913.1 | 47° | 2.3 |
| 2° | 3,901.1 | 48° | 1.6 |
| 3° | 3,876.8 | 49° | 1.1 |
| 4° | 3,838.2 | 50° | 0.7 |
| 5° | 3,784.0 | 51° | 0.5 |
| 6° | 3,713.4 | 52° | 0.0 |
| 7° | 3,626.2 | 53° | 0.0 |
| 8° | 3,522.4 | 54° | 0.0 |
| 9° | 3,402.6 | 55° | 0.0 |
| 10° | 3,267.8 | 56° | 0.0 |
| 11° | 3,119.3 | 57° | 0.0 |
| 12° | 2,958.8 | 58° | 0.0 |
| 13° | 2,788.3 | 59° | 0.0 |
| 14° | 2,609.9 | 60° | 0.0 |
| 15° | 2,426.0 | 61° | 0.0 |
| 16° | 2,239.0 | 62° | 0.0 |
| 17° | 2,051.3 | 63° | 0.0 |
| 18° | 1,865.3 | 64° | 0.0 |
| 19° | 1,683.2 | 65° | 0.0 |
| 20° | 1,506.9 | 66° | 0.0 |
| 21° | 1,338.3 | 67° | 0.0 |
| 22° | 1,178.9 | 68° | 0.0 |
| 23° | 1,029.9 | 69° | 0.0 |
| 24° | 892.1 | 70° | 0.0 |
| 25° | 766.1 | 71° | 0.0 |
| 26° | 652.1 | 72° | 0.0 |
| 27° | 550.2 | 73° | 0.0 |
| 28° | 460.1 | 74° | 0.0 |
| 29° | 381.1 | 75° | 0.0 |
| 30° | 312.8 | 76° | 0.0 |
| 31° | 254.4 | 77° | 0.0 |
| 32° | 204.9 | 78° | 0.0 |
| 33° | 163.4 | 79° | 0.0 |
| 34° | 129.1 | 80° | 0.0 |
| 35° | 100.9 | 81° | 0.0 |
| 36° | 78.1 | 82° | 0.0 |
| 37° | 59.9 | 83° | 0.0 |
| 38° | 45.4 | 84° | 0.0 |
| 39° | 34.1 | 85° | 0.0 |
| 40° | 25.3 | 86° | 0.0 |
| 41° | 18.6 | 87° | 0.0 |
| 42° | 13.5 | 88° | 0.0 |
| 43° | 9.7 | 89° | 0.0 |
| 44° | 6.9 | 90° | 0.0 |
| 45° | 4.9 |
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 | 979 | 594 | 106 | 8 | 0 | 1.3 m |
| 2.5 m | 627 | 463 | 155 | 26 | 3 | 1.6 m |
| 3.0 m | 435 | 356 | 169 | 47 | 9 | 1.9 m |
| 3.5 m | 320 | 278 | 163 | 64 | 18 | 2.2 m |
| 4.0 m | 245 | 221 | 149 | 73 | 27 | 2.5 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.