modern age, LEDs have emerged with RGB technology to allow Christmas lights to display a possible range of around 4.6 billion colors. One alternative is the use of RGBW technology which also adds the ability for lights to allow display a range of whites from warmer to cooler. RGB technology allows for far more animation then standard electronic light controls including the ability to smoothly fade through different colors. One drawback to this technology for outdoor lighting, at least in North America, has been that squirrels have been found damaging them. The species must wear down their continually-growing incisors by gnawing on hard objects. They apparently find the diode's durable plastic construction useful for this, while its low power consumption means a minimal chance of electrical shocks to discourage them. Animal experts have suggested leaving edible hard nuts on the ground around lighting fixtures to distract the rodents with food that can serve the same dental needs. Fiber optic lights Fiber optic technology is also used in holiday lighting, especially by incorporating it into artificial Christmas trees. Incandescent lamps or LEDs are located in the tree base and many optic fibers extend from the lamps to the ends of the tree branches. Bubble lights Bubble lights are a type of incandescent novelty light that acquired some popularity during the 1950s. Their main feature is a sealed glass tube with a colored bubbling liquid inside, created by the heat from the incandescent light. The fluid within the vial was originally a lightweight oil, but now is methylene chloride for a more consistent bubble effect. While the idea was first demonstrated by Benjamin Franklin, the idea was adapted for use in Christmas lights. They were invented by Carl Otis in 1935, who sold the patents to the NOMA Electric Corporation. There is a long story involving patent fights. Bubble lights can still be purchased online and in stores to this day. Laser projectors Laser projector systems became a prominent phenomenon in 2015; the devices are typically installed on a stake in front of a house, projecting colored dots resembling stars. The devices are marketed as being safer and easier to install than traditional string lights. The concept was popularized by Telebrands, which launched a brand of low-cost laser projectors known as Star Shower Laser Light in July 2015. Star Shower saw a considerably high demand, with stores quickly running out of stock,