What is Candela (cd)
Candela (symbol: cd) is a unit of measurement used in the lighting industry to quantify luminous intensity. It represents the amount of light emitted by a light source in a specific direction. The candela value is not affected by the distance from the light source but is influenced by the opening angle of the light beam.
Mungkin Anda Tertarik Dengan
- Ceiling-mounted PIR occupancy sensor dengan output dry-contact relay
- Suplai tegangan rendah 12/24VDC atau 12/24VAC
- Kontak relai terisolasi COM, NO, dan NC untuk input EMS, HVAC, dan kontrol gedung
- Low-voltage DC recessed ceiling-mounted microwave motion sensor switch
- Input 12 VDC / 24 VDC dengan rentang 10-30 VDC
- Arus kerja maks 10A dengan waktu tunda (time delay), ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Higher-load recessed ceiling-mounted microwave motion sensor switch
- Input tegangan jala-jala 100-265 VAC, model 10A
- Penginderaan gelombang mikro 5.8 GHz dengan waktu tunda (time delay), ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Recessed ceiling-mounted microwave motion sensor switch
- Input tegangan jala-jala 100-265 VAC, model 5A
- Penginderaan gelombang mikro 5.8 GHz dengan waktu tunda (time delay), ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Ceiling-mounted RZ037 PIR occupancy sensor dimmer untuk daya 220V
- Arus kerja maksimum 3A dengan beban pengenal 660W
- Tombol LUX mengontrol ON/OFF sensor cahaya dan kecerahan peredupan yang diatur pengguna
- Ceiling-mounted RZ037 PIR occupancy sensor dimmer untuk daya 110V
- Arus kerja maksimum 3A dengan beban pengenal 330W
- Tombol LUX mengontrol ON/OFF sensor cahaya dan kecerahan peredupan yang diatur pengguna
- Sakelar sensor gerak gelombang mikro plafon DC tegangan rendah
- Input 12 VDC / 24 VDC dengan rentang 10-30 VDC
- Arus kerja maks 10A dengan waktu tunda (time delay), ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak gelombang mikro plafon beban lebih tinggi
- Input tegangan jala-jala 100-265 VAC, model 10A
- Penginderaan gelombang mikro 5.8 GHz dengan waktu tunda (time delay), ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak gelombang mikro plafon
- Input tegangan jala-jala 100-265 VAC, model 5A
- Penginderaan gelombang mikro 5.8 GHz dengan waktu tunda (time delay), ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak PIR tanam plafon DC tegangan rendah
- Input 12 VDC / 24 VDC dengan rentang 10-30 VDC
- Arus kerja maks 10A dengan jeda waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak PIR tanam plafon beban lebih tinggi
- Input tegangan jala-jala 100-265 VAC, model 10A
- Deteksi 360 derajat dengan jeda waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Sakelar sensor gerak PIR tanam plafon
- Input tegangan jala-jala 100-265 VAC, model 5A
- Deteksi 360 derajat dengan jeda waktu, ambang batas Lux, dan sensitivitas yang dapat disesuaikan
- Kit penerima dan sakelar nirkabel untuk kontrol pencahayaan ON/OFF dalam ruangan
- Penerima 100-230VAC, 50/60Hz dengan arus nominal 5A
- Sakelar nirkabel bertenaga CR2032 dengan komunikasi 2.4GHz
- Okupansi (Auto-ON/Auto-OFF)
- 12–24V DC (10–30VDC), hingga 10A
- Cakupan 360°, diameter 8–12 m
- Jeda 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 (diperlukan kabel netral)
- Cakupan 360°; diameter deteksi 8–12 m
- Jeda waktu 15 dtk–30 mnt; Lux MATI/15/25/35; Sensitivitas Tinggi/Rendah
- Mode okupansi Auto-ON/Auto-OFF
- 100–265V AC, 5A (diperlukan kabel netral)
- Cakupan 360°; diameter deteksi 8–12 m
- Jeda waktu 15 dtk–30 mnt; Lux MATI/15/25/35; Sensitivitas Tinggi/Rendah
- 100V-230VAC
- Jarak Transmisi: hingga 20m
- Sensor gerak nirkabel
- Kontrol berkabel
- Tegangan: 2x Baterai AAA / 5V DC (Micro USB)
- Mode Siang/Malam
- Jeda waktu: 15mnt, 30mnt, 1j (bawaan), 2j
- Adaptor daya colokan UE
- Adaptor daya colokan Inggris
The opening angle refers to the width or narrowness of the light beam emitted by the source. A smaller opening angle, such as 10°, concentrates the light, resulting in a higher candela value. Conversely, a larger opening angle, like 50°, spreads the light over a wider area, leading to a lower candela value.
Note that Candela is a measure of luminous intensity, which is distinct from luminous flux. Luminous flux is measured in lumens (lm) and represents the total amount of visible light emitted by a source in all directions. In contrast, candela focuses on the intensity of light emitted in a specific direction.
Mencari Solusi Hemat Energi Berbasis Sensor Gerak?
Hubungi kami untuk sensor gerak PIR lengkap, produk hemat energi berbasis sensor gerak, sakelar sensor gerak, serta solusi komersial Occupancy/Vacancy.
Frequently Asked Questions
What Is the Cd in Light Intensity
The candela (symbol: cd) is the SI base unit of luminous intensity. It represents the power emitted by a light source in a specific direction, taking into account the luminosity function. For example, a typical candle emits light with a luminous intensity of approximately 1 cd.
What Is the Difference Between Cd and Lux
Candela refers to the amount of light emitted by a fixture in a specific direction, while lux measures the level of light that illuminates a surface.
Is CD the Same as Lumen
1 candela is equivalent to 12.57 lumens. However, it is not advisable to directly compare the values of lumens and candela when it comes to lighting devices.
How Do You Calculate Candela CD
The calculation can be done using the formula 1lm = 1cd * 1. This means that 1 lumen is equal to 1 candela. In other words, a light source with an intensity of 1 candela will produce 1 lumen of luminous flux in a sphere with a surface area of 1 square meter.
How Many Candela Is a 100 Watt Bulb
The luminous intensity of a 100 watt unidirectional bulb is equivalent to 100 candela.
How Many Watts Is 1 Candela
In 1979, the General Conference on Weights and Measures (CGPM) established a new definition for the candela (cd). It is now defined as the luminous intensity, in a specific direction, of a source that emits monochromatic radiation with a frequency of 540 × 10^12 hertz. Additionally, the radiant intensity of this source in that direction is equivalent to 1/683 watt per steradian.
How Many Candelas Is a Lightbulb
For a more up-to-date comparison, a standard incandescent lightbulb typically produces around one candela per watt.
Is Higher or Lower Candela Better
A higher candela rating indicates that the light emitted is more intense, allowing it to travel a longer distance. Torches with high candela ratings are ideal for situations where visibility is reduced, such as in smoke or fog, and when a concentrated beam is desired.
