R40 and BR40 are two types of reflector bulbs commonly used for indoor and outdoor lighting. Both are 40/8 inches (5 inches) in diameter, but they differ in design and lighting characteristics:

R40 Bulbs

• Shape: R stands for "Reflector." R40 bulbs have a smooth, rounded shape and a reflective coating inside the bulb that directs light forward.
• Beam Angle: Typically provides a more focused beam of light, suitable for general-purpose lighting or spotlights.
• Use Cases: Often used in recessed lighting, track lighting, and outdoor floodlights.
• Design: Lacks the flared edge of BR bulbs, making the light output slightly more directional.

BR40 Bulbs

• Shape: BR stands for "Bulged Reflector." BR40 bulbs have a slightly bulged shape and a wider flare at the end of the bulb.
• Beam Angle: Produces a wider beam spread, making them ideal for providing broader, softer light.
• Use Cases: Common in recessed ceiling fixtures for general illumination or ambient lighting.
• Design: The bulge and frosted finish help diffuse light more evenly than R40 bulbs.

When choosing between the two, consider the desired lighting effect and the fixture type. If you need broader coverage and softer lighting, go for BR40. If you want a more focused beam, R40 might be the better option.