Philips 13165 14V 35W GZ4 Bulb

Product Overview

Philips 13165 – 35W 14V Halogen Reflector Lamp | 3400K | 100 CRI | GZ4 | Dental Hardening / Curing | 50-Hour Rated Life

The Philips 13165 (35W GZ4 14V 1CT/10X5F) is a 35W 14V halogen reflector lamp with a GZ4 base and smooth dichroic reflector, designed specifically for dental hardening and curing applications. It operates at 3400K with 100 CRI, providing intense, color-accurate illumination required by dental curing units and optical hardening systems. The rated life is 50 hours, which is standard for high-intensity dental curing lamps operating at elevated color temperature. The quartz envelope is UV-open (no UV filtering). Dimmable. Please verify voltage (14V), base type (GZ4), and equipment compatibility before ordering.

Wattage

35W

Halogen

Voltage

14V

Not 12V

Color Temp

3400K

100 CRI

Base

GZ4

Dental / Medical

Rated Life

50 hrs

Technical Specifications

Brand	Philips (Signify)
Philips Code	13165
Order Product Name	13165 35W GZ4 14V 1CT/10X5F
Order Code	923889018304
Full Product Code	8711500409768
Lamp Type	Halogen Reflector — Smooth Dichroic, Quartz UV-Open
Main Application	Dental Hardening / Curing
Base	GZ4
Wattage	35W
Voltage (Nom)	14V (not 12V — see Before Ordering)
Color Temperature (Nom)	3400K
CRI (Nom)	100
Working Distance WD	21mm
Reflector Finish	Smooth dichroic — directs IR heat rearward
Bulb Material	Quartz — UV Open (no UV filtering)
Overall Length C (Max)	42mm (1.65″)
Diameter D (Max)	35mm (1.38″)
Burn Position	Universal (any orientation)
Dimmable	Yes
Life to 50% Failures (Nom)	50 hours (standard for dental curing application)
Max Bulb Temperature	900°C
Max Pinch Temperature	400°C
Net Weight	0.024 kg
EAN / UPC	8711500409768
Pack Quantity	1 per pack; 50 per outer box (10×5)

Product Overview

The Philips 13165 is a 35W halogen reflector lamp engineered specifically for dental composite hardening and light-curing equipment. The 3400K color temperature at 100 CRI delivers a high-intensity, full-spectrum light output required for reliable photopolymerization of dental curing materials. The elevated 3400K operating point (compared to standard 2900–3000K halogen lamps) provides the spectral output density in the blue/violet range needed by light-activated dental composites, while the smooth dichroic reflector directs infrared heat rearward to protect the optical system and reduce patient discomfort.

The 50-hour rated life (L50) is standard and expected for dental curing lamps operating at this elevated color temperature and intensity. High color temperature shortens filament life significantly compared to general lighting lamps; this is an inherent trade-off in the dental curing application, not a product defect. Dental practices should plan for routine replacement based on equipment usage hours and monitor curing performance, as light output degrades before catastrophic failure.

The GZ4 base and 14V operating voltage are specific to dental curing unit power supplies. This lamp is not interchangeable with standard 12V GU4/G4 landscape or display lighting lamps — the voltage, base geometry, and application are entirely different. The quartz envelope is UV-open (no UV filter), which is required for the dental curing wavelength range but means the lamp emits unfiltered UV radiation — the equipment housing provides the necessary shielding.

Compatible Applications

Dental composite hardening / light-curing equipment
Dental operatory photopolymerization systems
Medical and scientific optical hardening systems requiring 35W 14V GZ4 halogen reflector lamps
Any dental/medical equipment specifying Philips 13165 or equivalent 35W 14V GZ4 curing lamp

Before Ordering – Verify

This lamp operates at 14V, not 12V. It is designed for dental curing equipment with 14V internal power supplies. It is not compatible with standard 12V landscape or display lighting transformers. Confirm the equipment power supply outputs 14V.
Base type: GZ4. This is not interchangeable with GU4, G4, or GU5.3 bases. Confirm the equipment lamp holder is specifically GZ4.
50-hour rated life is normal for this application. Dental curing lamps operate at elevated color temperature (3400K) for the required spectral output; this inherently shortens filament life. Plan routine replacement based on equipment usage tracking.
UV-open quartz envelope: This lamp emits unfiltered UV radiation. It must only be used in dental/medical equipment that provides appropriate UV shielding to the patient and operator.
Confirm the Philips code 13165 matches the equipment manufacturer’s lamp specification. Multiple halogen reflector lamps exist at similar wattages and voltages with different base types, working distances, and reflector specifications.
Working distance: 21mm. Confirm this matches the equipment’s optical design; a lamp with a different working distance will not focus correctly in the curing handpiece.

Safety and Handling Guidelines

This lamp emits unfiltered UV radiation (Quartz UV-Open); it must only be operated inside dental/medical equipment that provides appropriate UV shielding
Do not look directly at the lamp output during operation; dental curing lamp output is intense enough to cause eye damage
Allow the lamp and equipment to cool completely before relamping; max bulb temperature reaches 900°C during operation
Do not touch the quartz reflector or bulb with bare skin; skin oils cause localized thermal stress that can cause premature failure. Use clean gloves or handle by the base; clean with isopropyl alcohol if contact occurs
Lamp replacement in dental equipment should follow the equipment manufacturer’s maintenance protocol
Dispose of in accordance with local regulations

Compliance

For use in dental/medical equipment only — not for general lighting applications
UV-open (no UV filtering) — equipment must provide UV shielding
Philips/Signify manufactured