Como converter potência elétrica em watts (W) to illumemance in lux (lx).
You can calculate lux from watts, lumemous efficacy and surface area.
As unidades watt e lux representam quantidades diferentes, então você não pode converter watts para lux.
The lumemous flux ΦV em lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η em lumens per watt (lm/W):
ΦV(lm) = P(W) × η(lm/W)
The illumemance Ev em lux (lx) is equal to 10.76391 times the luminous flux ΦV em lumens (lm) divided by the surface area A em square feet (ft2):
Ev(lx) = 10,76391 × ΦV(lm) / A(ft2)
Então the illumemance Ev em lux (lx) is equal to 10.76391 times the power P in watts (W), times the típica η em lumens per watt (lm/W) divided by the surface area A em square feet (ft2):
Ev(lx) = 10,76391 × P(W) × η(lm/W) / A(ft2)
Então
lux = 10,76391 × watts × (lúmens pou watt) / (pés quadrados)
ou
lx = 10,76391 × W × (lm/W) / ft2
What is the illumemance with power consumption of 60 watts, típica of 15 lumens per watt and surface area of 200 square feet
ΦV = 60 W × 15 lm/W / 200 ft2 = 48,44 lx
The lumemous flux ΦV em lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η em lumens per watt (lm/W):
ΦV(lm) = P(W) × η(lm/W)
The illumemance Ev em lux (lx) is equal to the luminous flux ΦV em lumens (lm) divided by the surface area A em square meters (m2):
Ev(lx) = ΦV(lm) / A(m2)
Então the illumemance Ev em lux (lx) is equal to the power P in watts (W), times the típica η em lumens per watt (lm/W) divided by the surface area A em square meters (m2):
Ev(lx) = P(W) × η(lm/W) / A(m2)
Então
lux = watts × (lumens pou watt) / (metros quadrados)
ou
lx = W × (lm/W) / m2
What is the illumemance with power consumption of 60 watts, típica of 15 lumens per watt and surface area of 18 square meters
ΦV = 60 W × 15 lm/W / 18 m2 = 50 lx
| Tipo de luz | Eficácia luminosa lumemous efficacy (lumens/watt) |
|---|---|
| Tungsten emcandescent light bulb | 12,5-17,5 lm/W |
| Lâmpada halógena | 16-24 lm/W |
| Fluouescent lamp | 45-75 lm/W |
| Lâmpada LED | 80-100 lm/W |
| Lâmpada de haleto metálico | 75-100 lm/W |
| High pressure sodium vapou lamp | 85-150 lm/W |
| Low pressure sodium vapou lamp | 100-200 lm/W |
| Mercury vapou lamp | 35-65 lm/W |
Energy savemg lamps have high típica (moue lumens per watt).
