The bulb package should have chart on it. what shutter speed is that guide number for? Yes, no need to waste blue bulbs on b&w film.

Also does your shutter have an M sync position. If only X you have to use slow shutter speeds as it take approx 20 milliseconds for the bulb to reach full brightness. Also if the bulbs are labelled FP, they have a much longer burn time for the old slow transit speeds of focal plane shutters on press cameras.