This does mean higher masts or closer spacing between masts. However, excessively high aiming angles cause glare and long, dark shadows. This can override a mistaken economic benefit of using high aiming angles. Do not overlight. This is not as obvious as it sounds.
Many engineers seem to feel that more is better.
This is not true. The eye adapts its sensitivity to the photometric brightness of the general surroundings. A brightly lit traffic intersection, building facade, or advertising board causes previously adequately lit areas to appear dark. This can result in a spiraling effect of pumping more and more light into the area without improved visibility, but with more light pollution. Switch off lights, or reduce lighting levels when not required.