For complex and outdoor environment that are constantly changing, sudden and frequent pressure dips/rises are a threat to sealed enclosures and the integrity of the casing. IPRO screw-in vents include ePTFE membrane that have a unique microstructure with natural hydrophobicity, uniformed pore size, high porosity, good air permeability, and high chemical corrosion resistance. This combination of unique characteristics enable quick pressure equalization for outdoor lighting and ensure a dry casing for long service life of lamps.