Product Overview

The Halco 104042 R40 Incandescent Flood Bulb is a high-output 500W replacement lamp designed for compatible pool, spa, recessed, flood, and specialty light fixtures that require a 120V E26 medium screw base bulb. With 5400 lumens of bright incandescent output, a clear hard-glass R40 reflector design, and 35° flood beam, this lamp is ideal for applications that require strong, focused illumination.

This bulb is commonly used as a replacement lamp in compatible incandescent pool and spa light fixtures. Always confirm fixture voltage, wattage rating, bulb shape, and gasket condition before installation.

Ideal For

Compatible pool light fixtures
Compatible spa light fixtures
R40 flood lamp replacement
High-output incandescent lighting
Specialty flood lighting applications
Maintenance and service repairs
Pool service technicians
Customers replacing 500W 120V incandescent bulbs

Key Features

500W incandescent R40 flood bulb
120V operation
E26 medium screw base
5400 lumen light output
Clear hard-glass reflector lamp design
35° flood beam angle
Dimmable when used with compatible dimming equipment
High CRI 99 light quality
Universal operating position
Designed for open or enclosed rated fixtures
Average rated life of approximately 2,000 hours
Common replacement option for compatible pool and spa lights

Benefits

The Halco 104042 provides powerful incandescent light output for fixtures designed to handle 500W R40 lamps. Its E26 medium screw base makes installation straightforward in compatible sockets, while the R40 reflector shape and 35° flood beam help direct light for broad underwater or specialty fixture illumination.

For pool and spa lighting, this bulb is a practical replacement when the existing incandescent lamp has burned out and the fixture is still rated for a 500W, 120V R40 bulb. Replacing the lens gasket during service is strongly recommended to help prevent water from entering the light fixture.

Specifications

Customer-Facing Q&A

What is the Halco 104042 used for?
The Halco 104042 is a 500W R40 incandescent flood bulb used in compatible fixtures that require a 120V E26 medium-base lamp.

Can this be used in a pool light?
Yes, only if the pool light fixture is rated for a 500W, 120V R40 incandescent lamp with an E26 medium base. Always confirm your fixture model before ordering.

Is this bulb 120V or 12V?
This model is 120V. It should not be used in 12V fixtures.

What base does this bulb have?
It has an E26 medium screw base.

How bright is this bulb?
The Halco 104042 is rated at 5400 lumens.

Is this an LED bulb?
No. This is an incandescent bulb.

Is it dimmable?
Yes, it is dimmable when used with compatible dimming equipment and a fixture rated for this lamp type.

Should I replace the gasket when installing this in a pool light?
Yes. When servicing a pool or spa light fixture, the lens gasket should typically be replaced to help prevent leaks and water intrusion.

Confirm Before Ordering

Confirm the following before purchasing:

Voltage: 120V
Wattage: 500W
Bulb shape: R40
Base: E26 medium screw
Fixture rating: Must support 500W incandescent lamps
Application: Confirm pool, spa, recessed, or specialty fixture compatibility
Gasket: Replace lens gasket when servicing pool/spa light fixtures

Do not install this lamp in a fixture that is not rated for 500W incandescent operation. Pool and spa lights must be serviced with power shut off at the breaker and should be handled by a qualified pool professional or electrician.