Blackcountryman
Electrical
- Jul 14, 2005
- 72
I've inherited a trial of a energy saving device (voltage reduction) for high mast lighting, our lighting specialist has retired and gone to live in Spain.
The spec calls for horizontal illuminance of 20 lux with uniformity factor of 4:1 and verical illuminance of 20 lux at a hight of 2m.
I need to establish the reduction in light level when the supply is reduced from 230V to 200V.
When I've measured light levels before the sensor has been pointed up, so I assume this is the vertical measurement.
How do I measure horizontal illumination, just turn the device through 90deg?
As you may have guessed I'm not a lighting specialist.
The spec calls for horizontal illuminance of 20 lux with uniformity factor of 4:1 and verical illuminance of 20 lux at a hight of 2m.
I need to establish the reduction in light level when the supply is reduced from 230V to 200V.
When I've measured light levels before the sensor has been pointed up, so I assume this is the vertical measurement.
How do I measure horizontal illumination, just turn the device through 90deg?
As you may have guessed I'm not a lighting specialist.
