Digilume Universal DE Par Reflector Inserts are a highly reflective, low hanging design that allows for optimal par (umol/s) light intensity. Optimal hang heights for best results are a minimum of 4'-5’+ above the plant canopy depending on adjacent light fixture overlap. This universal reflector insert also fits other popular DE reflector fixture arms. Please contact UHS for more information and details on this unique product feature and functions. 99.5% European Silver Coated Aluminum, 98% Reflective, Stucco Finish Designed and Made in the USA.