This is another category with the classic colourless mixture, but which have the special feature of an enclosed light-emitting diode in the pedestal. This serves to illuminate and display the crystal growth to maximum effect.
These Stormglasses can be switched on in the dark, enabling you to closely observe the beauty of the crystal growth, as depicted in the following pictures. Different colour types of diode can be used eg. Red, green, blue, white etc. This determines the final illumination colour, and these Stormglasses thus make attractive and unique bedside night-lights with their ever changing crystal formations.
On the request of a French customer, we have developed a Stormglass illuminated red from an inner "finger like" tube positioned inside the larger cylinder vessel.