The oil tube was invented by Paramount electric in order to get around the NOMA patent using Methylene Chloride. It was introduced for Christmas of 1947. These bubble lights were called "Crystal Snow" and had tall 4 inch tubes. Christmas by Carlisle is now manufacturing oil tubes with much more vibrant and better colors. The bubbles are small and dance slower; another mesmorizing bubblelight.
Oil Set- 9 Multicolored Lights
Red tube with red and green base, Light Blue tube with dark blue and red base, Gold tube with red and yellow base, Green tube with green and red base, Red tube with orange and yellow base, Pink tube with green and orange base, Light Blue tube with dark blue and red base, Light Green tube with yellow and green base, Clear tube with red and white base