Camera, Access Control, and LED lighting devices are rapidly moving towards using IEEE 802.3bt as their PoE standard for high PoE applications. The IEEE 802.3bt includes 8 Classes of PoE up to 90W. During the time this standard was under development, some security products required more power than the existing standards of IEEE 802.3af (15.4W) and IEEE 802.3at (30W) could provide. This led to the use of none standard types of PoE, such as UPoE which was adopted by most manufacturers, as it was based on the existing IEEE 802.3at.