Spray dispenser activated by sensed light level

A dispenser adapted to receive a containment portion holding a quantity of dispensable material, the dispenser having a circuit board, an indicator means, a valve adapted to be connected to the containment portion, and sensing means that senses a level of light in an environment immediately surrounding the dispenser, wherein the circuit board controls dispensing of the dispensable material by a cycle of dispensing that includes opening and closing the valve at predetermined intervals and the sensing means is electrically connected to the circuit board, wherein the circuit board is activated in response to a signal transmitted to the circuit board in response to the sensing means sensing a predetermined level of light;

• the dispenser including a setting which, when set, causes the dispenser to dispense the dispensable material as a spray able to destroy or repel insects, micro-organisms, or rodents when the sensing means senses a substantial absence of light, and wherein the sensing means and circuit board serve to prevent dispensing of the dispensable material when the dispenser is not in a substantially dark environment, such that once the circuit board is activated in response to the signal it cannot be deactivated until the dispensable material has been dispensed in accordance with the cycle, and wherein when the dispensable material has been dispensed in accordance with the cycle the indicator means indicates that this has occurred.