New to the forum and the scrap game in general so please bear with the noob for a moment



got my hands on a number of grow light ballasts. Type of stuff used to power big high pressure sodium and / or metal halide lights.

They're roughly shoebox size but weigh 20-30 lbs each. I haven't opened one up yet, but I don't understand what weighs so much in there and whether it has any scrap value

Any info appreciated. Thanks guys