- LED King’s T8 FIXTURE 4FT NULL Tube is another one of our premier LED tubes. The advantage to this tube is its versatility in that it can connect with double ended power, directly wired into AC100-277V. The power consumption of these LED Tube light is 18W. These Eco-friendly bulbs have a lifespan up to 50,000 hours or more and can save you up to 60% in power consumption. These are the highest quality products on the market today – they are certified and come with up to 5 years warranty!