1. Product Overview
This document provides instructions for the safe and effective use of the Technical Precision replacement light bulb designed for the MITUTOYO PH350 Profile Lamp. This is a high-quality halogen bulb intended for direct replacement.

Figure 1: Front view of the Technical Precision replacement bulb. This image shows the clear glass envelope and the two-pin GY6.35 base.
2. Safety Information
Please read and understand all safety warnings before handling or installing the light bulb.
- Power Disconnection: Always ensure the power supply to the MITUTOYO PH350 Profile Lamp is completely disconnected and the lamp is cool before attempting to replace the bulb.
- Handle with Care: Halogen bulbs operate at high temperatures. Avoid touching the glass envelope directly with bare hands, as oils from your skin can create hot spots and reduce bulb life. Use a clean cloth or gloves during installation.
- Eye Protection: Wear appropriate eye protection when handling light bulbs to prevent injury from accidental breakage.
- Proper Disposal: Dispose of old bulbs according to local regulations.
- Ventilation: Ensure adequate ventilation around the lamp fixture to prevent overheating.
3. Installation Instructions
Follow these steps to safely replace the light bulb in your MITUTOYO PH350 Profile Lamp:
- Disconnect Power: Turn off the MITUTOYO PH350 Profile Lamp and unplug it from the power source. Allow the lamp to cool down completely before proceeding.
- Access Bulb: Refer to your MITUTOYO PH350 Profile Lamp's original manual for specific instructions on how to access the bulb compartment. This usually involves opening a cover or panel.
- Remove Old Bulb: Carefully grasp the old bulb (using a cloth or gloves if it's still warm) and pull it straight out from its socket. Avoid twisting or bending the pins.
- Insert New Bulb: Holding the new Technical Precision replacement bulb with a clean cloth or gloves, align the two pins of the GY6.35 base with the holes in the socket. Gently push the bulb straight into the socket until it is firmly seated. Do not force it.
- Secure Compartment: Close and secure the bulb compartment cover or panel.
- Restore Power: Plug the MITUTOYO PH350 Profile Lamp back into the power source and turn it on to test the new bulb.

Figure 2: Side view of the replacement bulb, illustrating the GY6.35 base pins for proper insertion.
4. Operating Instructions
Once the Technical Precision replacement bulb is correctly installed, the operation of your MITUTOYO PH350 Profile Lamp will remain consistent with its original design.
- Power On/Off: Use the standard power switch on your MITUTOYO PH350 Profile Lamp to turn the light on or off.
- Warm-up Time: Halogen bulbs provide instant illumination.
- Brightness: The bulb is designed to provide the specified brightness and color temperature for the MITUTOYO PH350 Profile Lamp.
5. Maintenance
The Technical Precision replacement bulb requires minimal maintenance.
- Cleaning: If the bulb's glass surface becomes dirty, ensure the lamp is off and cool. Gently wipe the bulb with a clean, dry, lint-free cloth. Avoid using liquid cleaners.
- Replacement: The average life of this bulb is approximately 1000 hours. Replace the bulb when it burns out or if you notice a significant decrease in light output.
6. Troubleshooting
If the bulb does not function as expected, consider the following:
- Bulb Not Lighting:
- Check if the lamp is properly plugged into a working power outlet.
- Ensure the bulb is fully and correctly seated in its socket.
- Verify that the power switch on the lamp is in the 'ON' position.
- Inspect the bulb for any visible damage or a broken filament. If damaged, replace the bulb.
- Dim or Flickering Light:
- The bulb may be nearing the end of its lifespan. Consider replacing it.
- Ensure the lamp's power supply is stable and providing the correct voltage (12 Volts).
7. Specifications
Key technical specifications for the Technical Precision replacement bulb:
| Brand | Technical Precision |
| Model Name | PH350 PROFILE LAMP |
| Light Type | Halogen |
| Wattage | 100 Watts |
| Voltage | 12 Volts |
| Bulb Shape Size | T4 |
| Bulb Base | GY6.35 |
| Color Temperature | 3350 Kelvin |
| Average Life | 1000 Hours |
| Special Features | High Efficiency, Instant On |
| Material | Glass |
| Bulb Length | 1.73 Inches |
8. Warranty Information
For specific warranty details regarding your Technical Precision replacement bulb, please refer to the product packaging or contact Technical Precision directly. Warranty terms typically cover manufacturing defects for a specified period from the date of purchase.
9. Support
If you have any questions, require technical assistance, or need further support regarding your Technical Precision replacement bulb, please contact the manufacturer:
- Manufacturer: Technical Precision
- Online Store: Visit the Technical Precision Store on Amazon