For best results, use a 2700K (kelvin) CFL bulb as well as using this glass in thicker applications. This glass contains a small amount of copper, use an oxidizing flame for best results.
NS-147 Hydra is simply a beautiful light transparent icy green. As a multi-chromatic color, this glass will shift depending on light source and kelvin temperature of the light bulb. This color will present a beautiful green, light blue, and even a very light purple.