Philips Hue is generally considered a leading company for customizable color LED lights. Their products offer high quality and come with an extensive range of features, including the ability to adjust color, brightness, and temperature, as well as integration with smart home systems. Other notable companies include LIFX and Nanoleaf.

You can buy Philips Hue lights from a variety of places including:

1. Amazon - A wide range of Philips Hue products are available on Amazon. You can often find different models and deals here.

2. Best Buy - Best Buy also carries the full line of Philips Hue lights.

3. Home Depot - Home Depot carries Philips Hue products, both in-store and online.

4. Philips Hue's official website - You can also buy the lights directly from the manufacturer.

5. Walmart - You can find Philips Hue lights both in their physical stores and online.

6. eBay - If you are okay with buying second-hand items, eBay can also be a good place to find Philips Hue lights.

Remember to check for compatibility with your existing devices and systems before purchasing.