GE DRS 115/120V 1000W Projection Lamp #29947

GE 29947 DRS — 1000W 120V T20 Projection Lamp, Medium Prefocus Base

The GE DRS (order code 29947) is a 1000W projection lamp rated at 120 volts, built on a T20 bulb with a Medium Prefocus base and a C-13D filament. Rated life is 25 hours. Colour temperature is 3325K. Initial output is 28500 lumens. Maximum overall length is 5.75 in with a light centre length of 2.19 in. Burn position is restricted: Base Down — operate only vertical, base down. Typical application: Overhead Projection. Projection lamps are matched to specific optical systems — confirm the ANSI code, base, light centre length, and burn position against the equipment before ordering.

Technical Specifications

Product Overview

Projection lamps are precision optical sources. Unlike general lighting lamps, they are built with tailored filaments positioned to close tolerances so that the light source sits exactly where the equipment's optical system expects it. That is why light centre length and burn position appear on the specification alongside wattage and voltage: a lamp with the right base and wattage but the wrong filament position will not focus correctly.

This is an incandescent projection lamp. Filament design, light centre length, and burn position are all specified because the filament image is projected through the equipment optics — the lamp is part of the optical train, not merely a light source behind it.

Burn position matters on this lamp. It is rated BD: Base Down — operate only vertical, base down. Operating outside that range shortens life and can cause early failure, because the halogen cycle and the mechanical support of the filament are both designed around the intended orientation.

Compatible Applications

• Overhead Projection (GE listed application)
• Overhead and 8mm projection equipment
• Replacement lamp for equipment specified with ANSI code DRS

Before Ordering — Verify

• Confirm the equipment calls for ANSI code DRS. ANSI codes assure mechanical and electrical interchangeability between manufacturers, so this is the primary cross-reference.
• Confirm the base is Medium Prefocus.
• Confirm the supply is 120V. Supply voltage variation significantly affects lamp life.
• Confirm the required light centre length is 2.19 in. LCL positions the filament relative to the base and determines whether the lamp focuses correctly in the equipment.
• Confirm the equipment accommodates a maximum overall length of 5.75 in. Listed lengths include maximum tolerances, so actual lamps are generally slightly shorter.
• Confirm the equipment holds the lamp in a permitted burn position. This lamp is rated BD: Base Down — operate only vertical, base down.
• Note the 25 hour rated life when planning spares. Rated life is a laboratory median at rated voltage, not a service life guarantee — shock, vibration, voltage fluctuation, and temperature can all shorten it.
• Confirm case quantity — the manufacturer case quantity for this order code is 24.
• GE lists warning and caution notice A against this lamp. Refer to GE's published notices for this order code before installation.

Safety and Handling Guidelines

• Disconnect power and allow the lamp to cool completely before handling or replacement. Projection lamps run at high temperature and stay hot well after switch-off.
• Handle by the base, not the bulb. Do not install a lamp with a cracked or scratched bulb.
• Seat the lamp fully in its socket. A partially seated lamp can arc at the contacts and overheat the lampholder.
• Observe the BD burn position restriction. Operating outside the permitted orientation shortens life and can cause early failure.
• Ensure the equipment provides the cooling airflow it was designed with. Projection lamps depend on forced or convected air to stay within their thermal limits.
• Keep combustible materials clear of the lamp and lamphouse.
• Do not exceed the rated voltage. Overvoltage operation sharply reduces lamp life.
• Follow the equipment manufacturer's instructions for lamp installation and alignment.
• This lamp contains no mercury. Recycle or dispose of it in accordance with local requirements.

Compliance

• GE warning and caution notice reference: A. Refer to GE's published notices for this order code before specification or installation.
• Contains no mercury. Not subject to mercury lamp disposal or shipping restrictions.
• Rated life is stated per ANSI standard design life.
• Dispose of in accordance with local regulations.

Ordering Information

• Brand: GE Lighting
• Order Code: 29947
• Description / ANSI Code: DRS
• Family: Incandescent Projection
• Case Quantity: 24
• Lamp: 1000W, 120V, T20 bulb, Medium Prefocus base, C-13D filament
• Dimensions: 5.75 in MOL, 2.19 in LCL
• Rated Life: 25 hours
• Burn Position: BD
• Related lamps in this family: CZX/DAB (500W 120V, order code 29677); DRB (1000W 118V, order code 29968)

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.