Consider the following statements comparing sodium vapour street lamps with LED lamps:

1. Sodium lamps emit light in all directions (omnidirectionally), while LEDs are inherently directional emitters.

2. Sodium lamps have a longer operational lifespan than LEDs.

3. Sodium lamp light is nearly monochromatic yellow, while LEDs can produce a broad, tunable colour spectrum.

How many of the statements given above are correct?