1. LED Bulbs / Lighting
  2. LED Light Bulbs
  3. LED Flood
  4. R40
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Westinghouse 20 watt 120 volt DLR64 Medium Screw Base 2700K Warm White Flood LED
  1. = 100w 
$11.00 In Stock
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What Is a R40 Light Bulb?

R40 bulbs are a style of flood light bulb with a reflective coating on the inside of the bulb. Similar to other R-style bulbs, most R40 bulbs are frosted to create a softer light and reduce glare. Though they may vary slightly in size, most R40 bulbs have a diameter of approximately 5 inches.

Benefits of Using R40 LED Light Bulbs

Like the other lights in the LED family, R40 LED light bulbs have many uses and benefits to offer. These benefits include:

  • Last 10-25 times longer than traditional technology such as halogen and incandescent

  • Energy-saving (LEDs use 12-15% of the energy incandescents use)

  • Dynamic color temperature options (warm white --> bright white)

  • Very affordable

  • They don’t give off as much heat, benefitting spaces that are being actively cooled

  • Do not contain mercury (like compact fluorescents)

  • Turn on instantly, especially in cold temperatures

Where to Use R40 Light Bulbs

R40 light bulbs have similar uses to other flood light bulbs. Common applications for R40 bulbs include flood lighting, track lighting, and in recessed can fixtures. There are dimmable options as well that create a sense of ambiance if needed in the application.

Is R40 the Same as BR40?

While R40 sounds similar to BR40, they are very different in design and application. The biggest difference between R, BR, and PAR flood light bulbs is the reflector which is the part of the bulb that reflects and distributes the light emitted. Because of this, the types technically can be used interchangeably but the light distribution would have a different effect that might not be wanted in its application.

  • PAR stands for parabolic aluminized reflector which means the aluminized reflector is shaped into a parabola and this design makes them perfect for spot lighting.

  • BR stands for bulged reflector and they have a wider beam angle that can commonly be found in recessed fixtures.

  • R stands for the reflector coating that extends the direction the light is emitted making it much brighter. This feature makes them ideal for use in track lighting.

R30 vs R40

As with all LED flood light bulbs the difference between R30 and R40 is the diameter, which can be measured with the number code by referring to it as 1/8”. Using the R30 bulb as an example, the number 30 would represent 30 eighths of an inch, which would mean that the diameter of the bulb is 3.75”. The R40 is about 5” making it more suitable for larger fixtures such as downlights.