Tesla's much-embattled Cybertruck electric pickup truck has been spotted out for testing yet again, this time giving onlookers a clear look at what the rear light bar will look like. Consensus on current Cybertruck pre-production test mules is that Tesla has either finalised the design or is close to finalising it. It's likely that Tesla had to include the light bar to comply with US regulations, and Elon Musk has previously confirmed that the light bar will be present on the final production model.