How much temperature should be mantained in an diamond jewellery showrrom?

Question

how much heat does lightings creates with diamonds displayed in a showroom?

Answer 1

Doesn't matter about the diamonds unless they catch fire.  They are carbon, like charcoal, and can burn if heated enough but that's too hot for any diamond customers.  I'd say 68-72 to keep the customers (and employees) happy if you want to sell the diamonds.