I checked "other", because I use either red or "black" incandescent bulbs, with a dimmer- very low output, never any issues & long-lived healthy snakes with no apparent stress. I'm not sure what the "blue-aka Night Glo" is...maybe the same as a "black" bulb? The black bulbs give off a bluish/purplish glow, fyi. I don't use night-lights for all my snakes, only for specific ones that seem to like & do better with it, & currently do not keep any BPs, fyi. These lights add warmth but are never the sole source of their heat.
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