In this paper, a low voltage dc lighting system with wireless
sensor network control is developed. It is clearly demonstrated
that LVDC LED luminaires has a far superior lumens per watt
performance compared to traditional ac lighting. With the proposed
smart lighting system, the ambient light at the user’s location
is able to be controlled in real-time to give users the most
amount of indoor environmental quality but in an energy efficient
manner. Moreover, wireless lighting sensors help realize
better energy conservation and the human interaction with the
indoor lighting system by dimming LED lighting according to
set points in the controller. The LVDC LED system saves as
much as 44% energy compared to the original T8 fluorescent
system. Finally, the power losses in the dc grid are studied and
the experimental results show that a bigger energy saving potential
if the quality of the wires used can be improved.