The Light Pen is a must-have tool for anyone who needs to keep their information confidential. This fine point marker is loaded with special ink that can only be seen under UV light, making it the perfect way to keep your notes and messages private. The Light Pen comes with a mini LED UV black light, so you can easily view your messages and ensure that your information is kept secure. The lamp holder is a purple yanchao light, creating a unique ambiance and allowing you to write without being seen. A photo taken with purple lights will display your message, providing a fun and creative way to communicate.