Please be aware that a lot of UV lights advertised in places like eBay or Amazon are in fact 395 nm or 405 nm, not real 365 nm. Real UV lights 365 nm are expensive. True 365 nm UV light will show full rainbow of hidden color print in passport, money or other secure document like yellow, green, red. If you see only some blue or nothing it is not 356 nm UV light and it will not work with LabMax test. 395 nm is not UV light but blue light.