Jet IP66
Seal of approval for Jet lantern
Thorn has recently launched it's IP66 upgrade of their Jet range of road lanterns.
Although the road lantern is one of the most popular luminaires in general use, it has a well-known peculiarity - it doesn't like temperature change. Rain, for example, can cool down a lantern dramatically, causing a vacuum of 200 mbar (3 psi) or more inside the enclosure. If the seal between the body and bowl does not effectively equalize the pressure, air, moisture and other contaminants are drawn through into the luminaire, thus impairing performance.
Now Thorn has overcome this problem by upgrading its Jet lantern to IP66, complete with GORE™ controlled breathing vent. Containing a microporous ePTFE membrane the vent constantly allows the lantern to breathe with changing environmental conditions, thus ensuring a dust tight and jet proof seal. It also provides an effective barrier against harsh weather conditions (e.g., snow and high winds) and a longer, trouble-free service life due to reduced stress on the seal.