blinded by the Light

Why is it that all sorts of night-active insects fly straight into light sources? Being programmed to be active at night, attraction to light does not make any sense. If they strive for light, they could just fly during the day. And wouldn't there be the danger of just trying to fly straight into the full moon on a clear night? Is that a hint that nocturnal insects have evolved from diurnal ones? And why has no insectivorous species developed light sources - like deep-see fish - to easily capture all these badly programmed prey?