What is the initial height of burst for all 105mm illumination rounds?

The initial height of burst for all 105mm illumination rounds is set at 750 meters. This specific altitude is vital because it allows the illumination round to effectively light up an area for battlefield operations, maximizing visibility and providing tactical advantages during nighttime engagements. The height is determined based on the need to balance between sufficient illumination and safety measures, ensuring that the effects can be observed without posing a risk to ground personnel. The choice of 750 meters has been established through operational testing and battlefield experience to ensure optimal performance.