Barney uses these on Lily in a bar scene in Season 9.
Dave Baker (Property Master): “Another expensive prop we had to make in a short time frame. Our producer Chris Harris wrote the episode with these in it, and he really wanted people to think that Barney could have had a ‘guy’ who could have possibly made these for him. So we showed Chris a few prototype drawings and what you see is the final result. It has two working red lights that can flash or stay solid. It also has a blue light that emits from the goggle area. Fun stuff!















