Concerning the lamp(s) inside this product and spare part lamps sold separately:
These lamps are intended to withstand extreme physical conditions in household appliances, such as temperature, vibration, humidity, or are intended to signal information about the operational status of the appliance. They are not intended to be used in other applications and are not suitable for household room illumination.
If the dispenser in your dishwasher is no longer dispensing the detergent and rinse aid as it should be, you can simply have it replaced. This spare part will have your appliance performing just like new again in no time.