The Golden Candle

Currently in Minecraft it's very pretty much impossible to try and get moody lighting while also preventing mob spawns. The light level required for mob spawning being changed was mostly a remedy for this, but what if a player wants complete darkness? I present, the golden candle! Crafted with a Totem of Undying and a regular candle, the golden candle would prevent mob spawning entirely within a 20x20 cube around the candle. This mob prevention includes passive mobs.

P.S. The reason for such a large radius around the candle is so that players can keep the candles hidden underground or behind walls if it doesn't fit the aesthetics of their build.