I have been assured they are not working on plans for underwater smoking aids and drink dispensers despite demand from underwater parliamentary meetings held in (under?) the Maldives. Development of the underwater fairy lights and garden decorations is apparently going well.
Underwater autonomous systems which provide situational awareness and long-term environment monitoring are becoming increasingly more popular. In order to power these systems cables must be laid to supply power created onshore, expensive batteries must be used and constantly changed to ensure a steady power supply, or solar panels must be constructed on an above-water platform.
Photovoltaic cells have been previously tested for underwater use, but due to the lack of sunlight penetrating the water they only had limited success.