What are twist & lock and bayonet bases, and how are they different from screw-in bases?

<a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Twist-Lock/N-5yc1vZbmbuZ1z21lyh?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">Twist & lock bases</a>, often seen in recessed lighting and some outdoor fixtures, don't screw in but instead lock into place by inserting and turning. <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Bayonet/N-5yc1vZbmbuZ1z21mm5?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">bayonet bases</a>, recognized by their cylindrical shape and side pins, are commonly used in older fixtures and some specialty appliances. They don't use the traditional threaded screw-in design, so check the fixture before purchase.

What are some popular brands of light bulbs?

Some popular brands known for high-quality light bulbs include <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Aspen-Creative-Corporation/Non-Dimmable/N-5yc1vZbmbuZmirZ1z1airm?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">Aspen Creative Corporation</a>, <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Philips-Hue/Non-Dimmable/N-5yc1vZbmbuZpooZ1z1airm?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">Philips Hue</a>, and <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Bulbrite/Non-Dimmable/N-5yc1vZbmbuZg42Z1z1airm?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">Bulbrite</a>.

I'm looking to brighten up my kitchen island. What are some popular shape options, and what are they good for?

<a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Globe/N-5yc1vZbmbuZ1z132or?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">Globe bulbs</a> offer a wide, even light distribution for kitchen islands, perfect for general illumination. In contrast, <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Reflector/N-5yc1vZbmbuZ1z132nb?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">reflector bulbs</a> can direct light downwards, which is ideal for highlighting specific areas like countertops. Consider the overall aesthetic of your space when making your choice.

How do I decide which light bulb shape code I need?

To choose the right light bulb shape, consider the fixture you'll be using it in and look for the code (like A19, G25, or BR30) printed on your old bulb or in your fixture's specifications, ensuring a proper fit and desired light distribution. We offer <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Non-Dimmable/T40/N-5yc1vZbmbuZ1z17acqZ1z1airm?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">t40</a>, <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Non-Dimmable/ET18/N-5yc1vZbmbuZ1z17ho2Z1z1airm?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">et18</a>, and <a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Non-Dimmable/G50/N-5yc1vZbmbuZ1z0jmr0Z1z1airm?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">g50</a>.

What are type A light bulbs, and why are they so common?

<a href="https://www.homedepot.com/b/Lighting-Light-Bulbs/Type-A/N-5yc1vZbmbuZ1z1dq82?emt=plpfaq_2504_lightbulbs" style="text-decoration: underline;">Type A light bulbs</a> are the classic, pear-shaped bulbs you're most likely familiar with. They fit standard medium-base sockets and are widely used in lamps and fixtures throughout homes. Their popularity stems from their versatility, affordability, and compatibility with most everyday lighting setups, making them a reliable choice for general illumination.