![]() Too much visible light passes through and drowns out the “glow”.įiltered short wave UV lights on the other hand, filter out almost all visible light, allowing only shortwave ultraviolet light to pass through. As you can imagine, unfiltered UV lights allow a large amount of visible light through, rendering it useless for making many minerals glow. There are two types of short wave UV light filtered and unfiltered. ![]() In nature, long wave UV light is present in sunlight and is not harmful to humans. Because of that, the black lights we use as hobbyists are a great way to produce long wave UV light. These filters are generally inexpensive to buy for that reason. Long wave UV lights have filters which screen out a lot of the visible light they produce, but not all. What is the difference between short wave UV light and long wave UV light? Long wave Ultraviolet Light Ultraviolet light falls in the range of the electromagnetic spectrum between visible light and X-rays. It’s on this spectrum that we find UV light, X-rays and gamma rays. UV light is not visible to the human eye.Įlectromagnetic radiation is transmitted in waves or particles at different wavelengths and frequencies called the electromagnetic spectrum. If you plan to use the black light for prolonged periods of time, make sure it has features that help keep it cool.Ultraviolet light is a type of electromagnetic radiation, just like radio waves, infrared, X-rays and gamma-rays. Overheating can be an issue with any type of light fixture.Some are waterproof, while others are simply made to handle various bumps and scrapes. If you plan to use your black light outdoors, look for one that’s built to withstand that type of environment.Still others come with self-adhesive for sticking to walls, which may be best for someone who is trying to display a black light poster. Some come with mounting brackets to help you set things up, while others are designed to be used on a table or the floor with an included stand. Consider how you’ll set up the black light.Look for a black light that promises a flicker-free design, as a flickering light can be a major drawback of many black lights. ![]()
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