Common Fan Clutch Problems. The most common problem encountered with a fan clutch is when the car overheats while it is not running. This is when the fan clutch does not work properly and thereby decreasing the car air conditionerâs performance as the fan clutch also cools the condenser of the air conditioning unit.
Also referred to as Maximum Overall Length (MOL). For light bulbs, it measures the length of a light bulb, from the top of the bulb to the bottom of the base or pins and is typically expressed in inches. For light fixtures and ballasts, it applies to the total horizontal length of the item.
The unit einstein is sometimes used to refer to one mole per square meter per second. It means that each second a 1 square meter of surface has 6 x 1023 photons falling on it. Irradiance levels for plant growth can therefore be measured in micro-einsteins or in PAR watts/sq. meter. 400 watt HPS lamps has less PAR, typically 120 to 128 watts, but because the light is yellow it is rated at higher lumens (for the human eye). Illumination for plants is measured in PAR watts per square meter.