A lighting system to be connected to a power source, the lighting system comprising: - lighting modules (10, 120) each comprising a first connector assembly and a second connector assembly, the first connector assembly being located closer to a first module end than the second connector assembly, the second connector assembly being located closer to a second module end than the first connector assembly, the first connector assembly and the second connector assembly being compatible with each other such that the lighting modules (10, 120) are connected end-to-end to form a row having a first line end a second line end, each of the lighting modules (10, 120) comprising light emitting diodes (LEDS), wherein each of the lighting modules (10, 120) further comprises a printed circuit board comprising a PWM electrical trace between a first light modulation connector of the first connector assembly and a second light modulation connector of the second connector assembly, and a LED control circuit connected to the PWM electrical trace and to the light emitting diodes (LEDS); and - a master controller electrically connected to the first line end, the master controller adapted to being powered by the power source, the master controller being operative to control an intensity of the LEDs via the LED control circuit of each of the lighting modules (10, 120) by sending a first modulation signal and a second modulation signal to the LED control circuit of each of the lighting modules (10, 120) via the PWM electrical trace of each of the lighting modules (10, 120), the first modulation signal corresponding to a first LED intensity and the second modulation signal corresponding to a second LED intensity lower than the first LED intensity, wherein the first modulation signal is sent when the master controller detects a presence of the power source and the second modulation signal is sent when the master controller detects an absence of the power source; characterized in that the lighting system further comprises a slave controller electrically connected to the second line end, the slave controller adapted to being powered by the power source, wherein the master controller is operative to send a first control signal to the slave controller upon detection by the master controller of a presence of power from the power source, a presence of the first control signal being indicative of control of the intensity of the LEDs by the master controller, and wherein the slave controller is operative to send a second control signal to the master controller and the first modulation signal upon detection of an absence of the first control signal and of the presence of power from the power source by the slave controller, a presence of the second control signal being indicative of control of the intensity of the LEDs by the slave controller. wherein the lighting system is further connected to an external rechargeable battery, further wherein the master controller is operative to send the first control signal when the master controller detects a presence of power from the external rechargeable battery. - lighting modules (10, 120) each comprising a first connector assembly and a second connector assembly, the first connector assembly being located closer to a first module end than the second connector assembly, the second connector assembly being located closer to a second module end than the first connector assembly, the first connector assembly and the second connector assembly being compatible with each other such that the lighting modules (10, 120) are connected end-to-end to form a row having a first line end a second line end, each of the lighting modules (10, 120) comprising light emitting diodes (LEDS), wherein each of the lighting modules (10, 120) further comprises a printed circuit board comprising a PWM electrical trace between a first light modulation connector of the first connector assembly and a second light modulation connector of the second connector assembly, and a LED control circuit connected to the PWM electrical trace and to the light emitting diodes (LEDS); and - a master controller electrically connected to the first line end, the master controller adapted to being powered by the power source, the master controller being operative to control an intensity of the LEDs via the LED control circuit of each of the lighting modules (10, 120) by sending a first modulation signal and a second modulation signal to the LED control circuit of each of the lighting modules (10, 120) via the PWM electrical trace of each of the lighting modules (10, 120), the first modulation signal corresponding to a first LED intensity and the second modulation signal corresponding to a second LED intensity lower than the first LED intensity, wherein the first modulation signal is sent when the master controller detects a presence of the power source and the second modulation signal is sent when the master controller detects an absence of the power source;