Photometric Report
BLMB-4FT-3L-840-J31.ies
Luminaire lumens
2,997 lm
Calculated from the candela data
Efficacy
151 lm/W
At 19.9 W input
Peak intensity
1,220 cd
At 5° vertical, 45° horizontal
Luminaire efficiency
90%
Of 3,333 rated lamp lumens
Polar Candela Distribution
Each curve is a vertical slice through the luminaire: the listed plane on the right, the plane 180° opposite on the left. 0° is straight down.
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3D Candela Distribution
Intensity in every direction. Distance from the centre is candela. Drag to rotate.
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Iso Candela Diagram
Looking up at the luminaire. The centre is straight down and the outer ring is the horizon (90°). Horizontal angles run clockwise from 0° at the top.
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Cone of Light
Light level directly below the luminaire, and the beam width on the floor where intensity falls to 50% of peak. Two widths are listed when the luminaire's 0–180° and 90–270° beams differ.
| Mtg Height | Light Level | Beam Diameter (0°-180°) | Beam Diameter (90°-270°) |
|---|---|---|---|
| 6.0 ft | 33.9 fc | 12.5 ft | 18.3 ft |
| 8.0 ft | 19.1 fc | 16.6 ft | 24.5 ft |
| 10.0 ft | 12.2 fc | 20.8 ft | 30.6 ft |
| 12.0 ft | 8.5 fc | 25.0 ft | 36.7 ft |
| 14.0 ft | 6.2 fc | 29.1 ft | 42.8 ft |
| 16.0 ft | 4.8 fc | 33.3 ft | 48.9 ft |
| 24.0 ft | 2.1 fc | 49.9 ft | 73.4 ft |
| 32.0 ft | 1.2 fc | 66.6 ft | 97.9 ft |
| 40.0 ft | 0.8 fc | 83.2 ft | 122.3 ft |
| 48.0 ft | 0.5 fc | 99.9 ft | 146.8 ft |
| 56.0 ft | 0.4 fc | 116.5 ft | 171.2 ft |
| 64.0 ft | 0.3 fc | 133.2 ft | 195.7 ft |
File Details
- File
- BLMB-4FT-3L-840-J31.ies
- Format
- LM-63-2002
- Photometric type
- Type C
- Horizontal symmetry
- Symmetric in each quadrant
- Angles
- 19 vertical × 5 horizontal
- Light sources
- 96 × 34.7 lm
- Luminous opening (W × L × H)
- 0.909751 × 4 × 0.405915 ft
- Input watts
- 19.9 W
- Ballast factor
- 1
- Candela multiplier
- 1
- Ballast-lamp factor
- 1
- Test lab
- LTI Optics - www.ltioptics.com/ies
- Test date
- Tue Oct 31 13:21:56 2023
- Test number
- 1
- Manufacturer
- BJ TAKE LIGHTING
- Luminaire
- BLMB-4FT-3L-840-J31
- Lamp
- LED 0.5W 2835 MID POWER (150MA)
- Lamp catalogue number
- LM281BZ+