For any North American member interested in learning to access split phase 240V 60Hz supplies at home for 220-240V lamps and lighting equipment, I highly recommend watching the following tutorial:

https://youtu.be/LZbIJZe_YDs?si=VcmpPjJPvecfegTA

This tutorial can be helpful for running lamps and lighting equipment from many countries safely in North America.

However, when it comes to magnetic fluorescent and HID ballasts rated for 50Hz power grids, you would need to replace the capacitor if the ballast uses one in series with the lamp, but otherwise purely inductive magnetic ballasts for 230V 50Hz and 240V 50Hz operation would be somewhat underdriven while 220V 50Hz purely inductive magnetic ballasts should run at full power. As a good safety measure, I recommend using a power strip on each out of phase outlet to ensure that you can turn off the power when you are unplugging or plugging the lamp or fixture into your 240V 60Hz supply. Additionally, I am also aware that you should avoid using GFCI outlets when searching for out of phase outlets.

Feel free to correct me on anything I said incorrectly.

If you live in a older home, the old style 15A "kitchen split" outlets are a good source of 240v, and in fact can be rewired into a 240v outlet since they have hot wires from both sides of the transformer in the same junction box.

You just have to plug one in the top outlet and the other in the bottom outlet and you should get 240v.

Unfortunately GFCI protection killed them off, the costs of a double pole 15A GFCI breaker required to provide GFCI protection was pretty high cost and the code was amended to allow 20A kitchen outlets instead, which can be GFCI protected using a lower cost GFCI outlet instead.

I have noticed something similar in my laundry room where I have 2 120V 60Hz outlets right next to each other and discovered that I could get split phase 240V 60Hz from across the hot wires of both outlets.

Outlets in the same room on different circuits are also good since they're probably wired at the same time and so tend to land on adjacent slots on the breaker panel.

Sometimes homes might have a secondary provision for a dryer or stove that's not used but has the 240v outlet installed. You'll need to protect it at a lower current to safely use it though.