DR Handmade Strings NYE7-11 K3 Neon Hi-Def Electric Guitar Strings, Medium-Heavy, Yellow Gauge: Medium-Heavy (7-String) Super bright neon yellow coated strings that sound clear, bright and musical Super bright in daylight and under stage lighting, DR NEON is 100% black light reactive and glow strongly under UV lighting Coated to extend string life Sound as good, or better, than uncoated strings