What is Beam Spread
Beam spread is the dispersion or diffusion of light emitted from a flashlight or light fixture. It is a measurement of the angle at which the light beam spreads out from the center, determining the coverage area and intensity of the light. The beam angle is a specific value that indicates the angle of beam spread from the center of the beam. It is measured by drawing an imaginary line from the center of the light source to the point where the light intensity at the outer edges of the beam drops to 50 percent of the maximum. A narrow beam angle is characteristic of a spotlight, providing focused and concentrated illumination for smaller areas. In contrast, a wider beam angle is typical of a floodlight, dispersing light over a larger area.
Additionally, the field angle is a measurement of the angle from the centerline of the beam to a point where the light intensity is significantly reduced, usually around 10 percent of the maximum. This angle, also known as the cut-off angle, indicates the effective lighting area of a light bulb or fixture design.
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Beam spread values are typically expressed in terms of angles rather than distances. Lighting designers utilize these angles to determine the placement of fixtures in a space, considering factors such as desired light intensity and color temperature. By analyzing the beam and field angle data, designers can achieve optimal coverage and distribution of light in a given area.
Mungkin Anda Tertarik Dengan
- Sensor keterhunian PIR pemasangan di langit-langit dengan output relai kontak kering
- Suplai tegangan rendah 12/24VDC atau 12/24VAC
- Kontak relai terisolasi COM, NO, dan NC untuk input EMS, HVAC, dan kontrol bangunan
- Sakelar sensor gerak gelombang mikro pemasangan tanam di langit-langit bertegangan rendah DC
- Input 12 VDC / 24 VDC dengan rentang 10-30 VDC
- Arus kerja maksimum 10A dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak gelombang mikro pemasangan tanam di langit-langit untuk beban lebih tinggi
- Input tegangan saluran 100-265 VAC, model 10A
- Deteksi gelombang mikro 5,8 GHz dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak gelombang mikro terpasang rata (recessed) pada langit-langit
- Input tegangan saluran 100-265 VAC, model 5A
- Deteksi gelombang mikro 5,8 GHz dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Dimmer sensor keberadaan PIR RZ037 pasang langit-langit untuk daya 220V
- Arus kerja maksimum 3A dengan beban terukur 660W
- Tombol LUX mengontrol ON/OFF sensor cahaya dan kecerahan redup yang diatur pengguna
- Dimmer sensor keberadaan PIR RZ037 pasang langit-langit untuk daya 110V
- Arus kerja maksimum 3A dengan beban terukur 330W
- Tombol LUX mengontrol ON/OFF sensor cahaya dan kecerahan redup yang diatur pengguna
- Sakelar sensor gerak gelombang mikro pasang langit-langit DC tegangan rendah
- Input 12 VDC / 24 VDC dengan rentang 10-30 VDC
- Arus kerja maksimum 10A dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak gelombang mikro pasang langit-langit untuk beban lebih tinggi
- Input tegangan saluran 100-265 VAC, model 10A
- Deteksi gelombang mikro 5,8 GHz dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak gelombang mikro pasang langit-langit
- Input tegangan saluran 100-265 VAC, model 5A
- Deteksi gelombang mikro 5,8 GHz dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak PIR terpasang rata (recessed) pada langit-langit DC tegangan rendah
- Input 12 VDC / 24 VDC dengan rentang 10-30 VDC
- Arus kerja maks 10A dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak PIR pemasangan plafon tanam beban lebih tinggi
- Input tegangan saluran 100-265 VAC, model 10A
- Deteksi 360 derajat dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak PIR pemasangan plafon tanam
- Input tegangan saluran 100-265 VAC, model 5A
- Deteksi 360 derajat dengan penundaan waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Kit sakelar dan penerima nirkabel untuk kontrol pencahayaan ON/OFF dalam ruangan
- Penerima 100-230VAC, 50/60Hz dengan arus pengenal 5A
- Sakelar nirkabel berdaya baterai CR2032 dengan komunikasi 2,4GHz
- Okupansi (Auto-ON/Auto-OFF)
- 12–24V DC (10–30VDC), hingga 10A
- Cakupan 360°, diameter 8–12 m
- Penundaan waktu 15 dtk–30 mnt
- Sensor cahaya Mati/15/25/35 Lux
- Sensitivitas Tinggi/Rendah
- Mode okupansi Auto-ON/Auto-OFF
- 100–265V AC, 10A (memerlukan netral)
- Cakupan 360°; diameter deteksi 8–12 m
- Penundaan waktu 15 dtk–30 mnt; Lux NONAKTIF/15/25/35; Sensitivitas Tinggi/Rendah
- Mode okupansi Auto-ON/Auto-OFF
- 100–265V AC, 5A (memerlukan netral)
- Cakupan 360°; diameter deteksi 8–12 m
- Penundaan waktu 15 dtk–30 mnt; Lux NONAKTIF/15/25/35; Sensitivitas Tinggi/Rendah
- 100V-230VAC
- Jarak Transmisi: hingga 20 m
- Sensor gerak nirkabel
- Kontrol kabel (hardwired)
Pertanyaan yang Sering Diajukan
Why Does a Light Beam Spread
As the light beam moves away from the surface it is directed at or when the beam width is increased, it naturally spreads out and its intensity decreases. This phenomenon can be observed when using a torch and adjusting its distance from a wall, as the spread and intensity of the light will vary accordingly.
What Is Beam Spread Measured In
The measurement of beam spread refers to the diameter of the light projected onto the subject. To put it simply, if you were to shine a flashlight on a wall, the width of the illuminated circle would represent the beam spread. This measurement is typically expressed in feet. In the context of this discussion, we define beam spread as the area that receives 50% of the light power.
What Is the Beam Spread of a Flood Light
Flood lights typically have a beam spread ranging from over 45 degrees to approximately 120 degrees. Nevertheless, it is worth noting that certain lights advertised as floods may have a narrower beam angle of around 25 degrees. If you specifically require a light with such a narrow beam, it may be more suitable to consider spotlights instead.
What Beam Spread for Ceiling Height
Overlapping beam angles are important to ensure that the entire space is adequately illuminated, reducing the risk of accidents. For ceilings with a standard height of approximately 7.9 to 8.9 feet, a wider beam angle of 60 degrees or more is suitable. However, if your ceiling height exceeds 8.9 feet, a narrower beam angle of 45 degrees or less will be necessary.
What Happens When the Light Is More Spread Out
Light spreads out in a similar manner to how butter spreads from a gun. In other words, as light moves away from a point source, its intensity decreases due to its increased dispersion (similar to the decreased thickness of butter).
