DR Strings NGA-11 NEON Hi-Def Phosphorescent Green Acoustic Strings Medium-Light Vibrant tone and color Unique color coating keeps strings sounding great longer Nickel-plated electric strings wound on hexagonal cores DR's NEON strings are so bright in appearance "they look like they are on fire " DR's NEON strings shine brightly under stage lights, and are 100% black light active so they glow strongly under UV lighting