The deal ends in less than 13 hours, at 10 PM Pacific. At just $11.99 for a 2-pack, you’re essentially paying nearly $6 per light bulb, which is an amazing deal for a good smart light bulb.

Filters transmit some colours of light and absorb other colours of light. Colours which are transmitted pass through the filter and come out the other side. Colours which are absorbed do not pass ...