TL;DR: Yes, you will need a step-up voltage converter to use the Sun Bulb in the US. US wall sockets output 110-120V, and the Sun Bulb is designed for 220-240V.
What to buy
A step-up transformer that converts 110-120V to 220-240V. These are readily available online. We are not affiliated with any specific sellers and have not tested third-party units ourselves, but from a technical standpoint any converter matching that specification should work.
What to check before purchasing
Make sure the converter's wattage rating exceeds the power draw of the Sun Bulb. Most standard converters will comfortably cover it, but confirm this before you buy.
Still unsure?
Reach out through our contact page before purchasing and we will advise on compatibility.
