灯电压 meaning in English

lamp-voltage
modulating voltage

When the working palce is in high humidity ( relative humidity is more than 90 % ) area , or at high temperature and limited place , or at the place of high conductivity , the voltage of portable lighting fixture should be less than 12v
工作处于特别潮湿（相对温度经常在90 %以上）；处于高温而狭窄的环境或处于导电的空间中时，使用的手提移动灯电压不应超过12伏。
Under following circumstances , the voltage of portable lighting fixture shall not be more than 12v : extra humid places ( relative humidity is usually above 90 % ) , high temperature and confined spaces , or places with high conductivity
工作处于特别潮湿（相对温度经常在90 %以上）；处于高温而狭窄的环境或处于导电的空间中时，使用的手提移动灯电压不应超过12伏。
When working under extra humid condition ( relative humidity is usually above 90 % ) , in high temperature and narrow environment or at the place with high conductivity , the voltage of portable lighting fixture shall not be more than 12v
工作处于特别潮湿（相对温度经常在90 %以上）；处于高温而狭窄的环境或处于导电的空间中时，使用的手提移动灯电压不应超过12伏。