Photometric Data Sheet
| Luminaire | Polka - Down Lights, 38 deg | Lamp / LED | Integrated LED module |
|---|---|---|---|
| Luminous flux | 1,800 lm | Input power | 18.0 W |
| Efficacy | 100.0 lm/W | CCT | |
| CRI | >90 | BUG rating (TM-15-11) | B2-U0-G0 |
| Beam angle (50% Imax) | 38.0° | Field angle (10% Imax) | 62.7° |
| Voltage | AC220~240V |
| Distribution | Direct, rotationally symmetric | Maximum intensity | 4,164.9 cd |
|---|---|---|---|
| At angle | 0° V | Luminous shape | Circular |
| Luminous size | 135 mm dia. | Spacing/height (nominal) | 1.22 |
Polar distribution, rotationally symmetric. 0° is straight down.
| Zone | Lumens | % of total |
|---|---|---|
| 0–30° | 1,639 | 91.1% |
| 0–60° | 1,800 | 100.0% |
| 0–90° (total) | 1,800 | 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° | 820 | 820 |
| Mid 30–60° | 80 | 80 |
| 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° | 4,164.9 | 46° | 12.8 |
| 1° | 4,162.4 | 47° | 9.4 |
| 2° | 4,151.9 | 48° | 6.9 |
| 3° | 4,130.6 | 49° | 5.0 |
| 4° | 4,096.8 | 50° | 3.5 |
| 5° | 4,049.3 | 51° | 2.5 |
| 6° | 3,987.2 | 52° | 1.8 |
| 7° | 3,910.2 | 53° | 1.2 |
| 8° | 3,818.1 | 54° | 0.8 |
| 9° | 3,711.1 | 55° | 0.6 |
| 10° | 3,590.0 | 56° | 0.0 |
| 11° | 3,455.5 | 57° | 0.0 |
| 12° | 3,308.9 | 58° | 0.0 |
| 13° | 3,151.5 | 59° | 0.0 |
| 14° | 2,985.1 | 60° | 0.0 |
| 15° | 2,811.3 | 61° | 0.0 |
| 16° | 2,632.1 | 62° | 0.0 |
| 17° | 2,449.6 | 63° | 0.0 |
| 18° | 2,265.7 | 64° | 0.0 |
| 19° | 2,082.4 | 65° | 0.0 |
| 20° | 1,901.7 | 66° | 0.0 |
| 21° | 1,725.2 | 67° | 0.0 |
| 22° | 1,554.6 | 68° | 0.0 |
| 23° | 1,391.4 | 69° | 0.0 |
| 24° | 1,236.6 | 70° | 0.0 |
| 25° | 1,091.3 | 71° | 0.0 |
| 26° | 956.2 | 72° | 0.0 |
| 27° | 831.7 | 73° | 0.0 |
| 28° | 718.0 | 74° | 0.0 |
| 29° | 615.3 | 75° | 0.0 |
| 30° | 523.2 | 76° | 0.0 |
| 31° | 441.5 | 77° | 0.0 |
| 32° | 369.6 | 78° | 0.0 |
| 33° | 307.0 | 79° | 0.0 |
| 34° | 252.9 | 80° | 0.0 |
| 35° | 206.7 | 81° | 0.0 |
| 36° | 167.5 | 82° | 0.0 |
| 37° | 134.7 | 83° | 0.0 |
| 38° | 107.3 | 84° | 0.0 |
| 39° | 84.8 | 85° | 0.0 |
| 40° | 66.5 | 86° | 0.0 |
| 41° | 51.6 | 87° | 0.0 |
| 42° | 39.8 | 88° | 0.0 |
| 43° | 30.3 | 89° | 0.0 |
| 44° | 22.9 | 90° | 0.0 |
| 45° | 17.2 |
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 | 1,041 | 680 | 158 | 18 | 2 | 1.4 m |
| 2.5 m | 666 | 514 | 203 | 45 | 7 | 1.7 m |
| 3.0 m | 463 | 390 | 207 | 70 | 17 | 2.1 m |
| 3.5 m | 340 | 301 | 192 | 86 | 29 | 2.4 m |
| 4.0 m | 260 | 238 | 170 | 93 | 40 | 2.8 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.