Nothing quite says the 1970s like smoked glass. If that's the look you are going for, you might want to check out the Lily and Leah smoke glass pendant lights at BHS, which as you might expect, are at the more affordable end of the lighting market.
These always sell out very quickly, so if you want either of these Converse Chuck Taylor 1970s Ox or Chuck Taylor 1970s Hi reissues, you'll need to pre-order to secure a pair.