Left: Black light? (Red-violet light) Photos 2 and 3. Center: Glass filament light bulb? (Warm-colored light) Photo 4. *Warmer color than in the photo. Right: Black light (Blue-violet light) Photo 5. *More blue-violet than in the photo. *Please purchase only if you understand that these are used items and have been inspected and stored by an amateur. They will be bubble-wrapped and shipped to prevent breakage.