HDMI output (1920x1080) HD for high definition multi-channel live viewing only. 1080p recording resolution is limited to a maximum of 1920x1080 per channel. Image quality and resolution is dependent on the type of camera connected to the DVR.
Neon can last decades. In practical terms the normal expected life span is between 8 to 15 years. Neon can be repaired and recharged as long as the tubing is not cracked/broken.
The neon sign is an evolution of the earlier Geissler tube, which is an electrified glass tube containing a rarefied gas (the gas pressure in the tube is well below atmospheric pressure). When a voltage is applied to electrodes inserted through the glass, an electrical glow discharge results.