1. Introduction
This manual provides essential information for the safe and efficient use of your Philips 383133 PL-C ALTO 13W/841 Fluorescent Light Bulb. Please read these instructions carefully before installation and retain them for future reference.
The Philips 383133 is a compact fluorescent lamp (CFL) designed for general lighting applications. It features a 13-watt power consumption, a GX23-2 pin base, and emits a cool white light with a color temperature of 4100 Kelvin.
2. Safety Information
- WARNING: Always disconnect power before installing, removing, or servicing the bulb to prevent electric shock.
- Do not use this bulb in dimmable fixtures unless specifically rated for dimmable CFLs.
- Do not use this bulb in totally enclosed luminaires unless the luminaire is designed for CFLs.
- Avoid touching the glass portion of the bulb with bare hands during installation or removal. Use a clean cloth or gloves.
- If the bulb breaks, ventilate the room for 15 minutes and carefully clean up the broken glass and mercury using appropriate disposal methods for fluorescent lamps.
- This bulb contains mercury. Dispose of in accordance with local, state, and federal laws. Visit www.epa.gov/cfl/recycling-and-disposal-cfls for more information.
3. Product Overview
The Philips 383133 is a compact fluorescent light bulb designed for efficiency and longevity. Its GX23-2 pin base ensures a secure connection in compatible fixtures.

Image of the Philips 383133 PL-C ALTO 13W/841 2P 1CT GX23-2 Fluorescent Light Bulb, showing its compact design and pin base.
4. Specifications
| Feature | Specification |
|---|---|
| Brand | Philips |
| Model Number | 383133 |
| Light Type | Fluorescent (CFL) |
| Wattage | 13 Watts |
| Base Type | GX23-2 |
| Light Color | Cool White |
| Color Temperature | 4100 Kelvin (as per description) / 4200 Kelvin (as per specifications) - Note: There is a slight discrepancy in the provided data. |
| Brightness | 800 Lumens |
| Average Life | 10,000 Hours |
| Incandescent Equivalent | 60 Watts |
| Voltage Frequency | 100 to 240 Volts and 50 Hertz to 60 Hertz |
| Material | Copper |
| Indoor/Outdoor Usage | Outdoor |
5. Installation
- Turn off power: Locate the circuit breaker or fuse box that controls the power to the fixture where the bulb will be installed. Turn off the power completely.
- Remove old bulb (if applicable): If replacing an existing bulb, allow it to cool down completely. Gently pull the old bulb straight out from its base. Do not twist.
- Insert new bulb: Align the two pins of the Philips 383133 bulb with the corresponding slots in the GX23-2 socket. Gently push the bulb straight into the socket until it is fully seated. Do not force the bulb.
- Restore power: Once the bulb is securely installed, restore power to the fixture from the circuit breaker or fuse box.
- Test: Turn on the light switch to ensure the bulb is functioning correctly.
If you are unsure about any step, consult a qualified electrician.
6. Operation
The Philips 383133 fluorescent light bulb operates like a standard light bulb. Once installed in a compatible fixture with power supplied, it can be turned on and off using the fixture's switch.
- Initial Start-up: Some fluorescent bulbs may take a few seconds to reach full brightness upon initial activation.
- Frequent Switching: Frequent switching (turning on and off rapidly) can reduce the lifespan of fluorescent bulbs.
7. Maintenance
- Cleaning: Ensure the power is off and the bulb is cool before cleaning. Gently wipe the bulb with a soft, dry, lint-free cloth. Do not use liquid cleaners or abrasive materials.
- Replacement: When the bulb reaches the end of its life or fails, follow the installation instructions in Section 5 to safely replace it. Remember to dispose of the old bulb properly.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Bulb does not light up. | No power to the fixture, bulb not seated correctly, faulty bulb, faulty fixture. | Check power supply (circuit breaker/switch). Ensure bulb is fully inserted. Test with a known working bulb. Inspect fixture for damage. |
| Bulb flickers. | Loose connection, incompatible dimmer, cold temperature, bulb nearing end of life. | Ensure bulb is securely seated. Do not use with incompatible dimmers. Allow bulb to warm up in cold environments. Replace bulb if it's old. |
| Reduced brightness. | Dust accumulation, bulb nearing end of life. | Clean the bulb and fixture. Replace the bulb. |
9. Warranty and Support
For warranty information and customer support regarding your Philips 383133 PL-C ALTO Fluorescent Light Bulb, please refer to the official Philips website or contact Philips customer service directly. Keep your purchase receipt as proof of purchase.
You can typically find support contact details on the product packaging or by visiting the official Philips website: www.philips.com/support