Osram FSH 125W 120V NAED 54436

Osram 54436 FSH 125W 120V — ANSI FSH Single-Ended Halogen Lamp, G5.3 Base, 2500 Lumens, 3200K, CRI 100

The Osram FSH 125W 120V (product number 54436) is a single-ended tungsten halogen lamp for professional stage, studio, and photographic fixtures. It operates at 125W on 120V AC, produces 2500 lumens at a 3200K studio-standard color temperature with a color rendering index of Ra 100, and uses a G5.3 two-pin base with a CC-8 filament. Nominal lifetime is 200 hours. The lamp measures 57.0mm in overall length by 11.2mm in diameter with a light center length of 1.248 in, making it compact enough for small-aperture optical fixtures. It reaches full output instantly, holds nearly constant luminous flux across its life, and dims with the traditional amber shift of an incandescent source. This lamp may only be operated in a suitable enclosed luminaire fitted with a protective shield or grid. Confirm the ANSI code, base, light center length, and fixture rating before ordering.

Technical Specifications

Packaging and Logistics

The folding box is the smallest orderable unit. When ordering, quantities should be entered as single or multiple shipping units.

Product Overview

The FSH is a compact single-ended halogen lamp built for professional lighting work rather than general illumination. Its defining characteristic is color quality: a 3200K color temperature with a color rendering index of Ra 100. Ra 100 is the reference point of the color rendering scale, which is what a continuous-spectrum incandescent source achieves by definition, and 3200K is the long-standing tungsten standard that studio cameras and film stocks are balanced against. For camera work, that combination means the lamp reproduces color without the spectral gaps that discharge and LED sources introduce.

Because it is a tungsten filament source, the lamp reaches full output the instant it is switched on, with no warm-up and no restrike delay. Output stays nearly constant across the lamp's life rather than depreciating, and color stays consistent from lamp to lamp and from new to end of life — a practical requirement when several fixtures have to match on camera. It dims smoothly with the traditional amber shift of an incandescent source, warming in color as it dims, which is the behavior stage and studio operators expect and design around.

The physical package is small: 57.0mm overall length, 11.2mm diameter, and a 9-gram lamp weight, on a G5.3 two-pin base with a CC-8 coiled-coil filament. The light center length is 1.248 in, and this dimension matters as much as the base type in an optical fixture — it sets where the filament sits relative to the reflector or lens, and a lamp with the correct base but the wrong LCL will not focus properly. The compact envelope suits small-aperture fixtures, eye lights, and effect units where a larger lamp will not fit.

Nominal lifetime is 200 hours, which is typical for a high-color-quality tungsten source and short compared with general lighting lamps. Stock spares accordingly for any installation running these regularly.

Compatible Applications

• Stage and theatre lighting — compact spotlights, accent, and effect fixtures
• Low-profile and small-aperture luminaires where a larger lamp will not fit
• Studio, TV, and film production — eye lights, small fill lights, and accent fixtures
• Broadcast studio lighting requiring 3200K tungsten balance
• Professional photography — continuous lighting for product, macro, and tabletop work
• Club and disco effect lighting
• Applications requiring smooth dimming with incandescent amber shift
• Replacement lamp for fixtures specified with ANSI code FSH

Before Ordering — Verify

• Confirm the fixture specifies ANSI code FSH. ANSI codes identify a specific combination of wattage, voltage, base, filament, and light center length, and lamps with the same base are not interchangeable across different ANSI codes.
• Confirm the base is G5.3 two-pin.
• Confirm the required light center length is 1.248 in. A lamp with the correct base but a different LCL will not sit at the fixture's optical focus.
• Confirm the lamp envelope fits: 57.0 mm overall length by 11.2 mm diameter.
• Confirm supply voltage is 120V. Operating a 120V halogen lamp on a higher supply voltage shortens life dramatically.
• Confirm the luminaire is an enclosed type fitted with a protective shield or grid. This lamp must not be operated in an open fixture.
• Confirm the burning position permitted by the fixture manufacturer.
• If the fixture is dimmed, note that this lamp shifts warmer in color as it dims. Where constant color temperature is required across dimming levels, a tungsten source is not the right choice.
• Note the 200-hour nominal lifetime when planning spares and maintenance intervals.
• Note packaging: the smallest orderable unit is a single folding box, and the shipping box contains 24 lamps.

Safety and Handling Guidelines

• Halogen lamps may only be operated in suitable luminaires designed with protective mechanisms such as shields or grids, so that no parts or shards can escape if the lamp bursts and no ultraviolet radiation can escape during operation.
• The luminaire must carry a warning sign indicating that the lamp gives off high levels of heat.
• Disconnect power and allow the lamp to cool completely before handling or replacement. Halogen lamps run extremely hot and remain hot well after switch-off.
• Do not touch the quartz envelope with bare hands. Skin oils cause localized overheating of the quartz and lead to premature failure or bursting. If the envelope is touched, clean it with isopropyl alcohol before operating.
• Handle the lamp by its ceramic base, not the envelope.
• Do not exceed the rated 120V supply voltage. Overvoltage operation sharply reduces lamp life.
• Ensure the fixture provides adequate ventilation and that the lamp is not operated against combustible materials.
• Do not operate a lamp with a scratched, cracked, or otherwise damaged envelope.
• Follow the fixture manufacturer's instructions for the permitted burning position and lamp orientation.

Compliance

• REACh, Article 33 of EU Regulation (EC) 1907/2006: SCIP database declaration in work.
• Contains no mercury. Not subject to mercury lamp disposal or shipping restrictions.
• Dispose of in accordance with local regulations.

Ordering Information

• Brand: Osram
• Product Number (Americas): 54436
• Product Name: FSH 125W 120V 24/CS 1/SKU
• Global Order Reference: FSH 125W 120V G
• ANSI Code: FSH
• EAN / UPC: 4062172146258
• Shipping Box Code: 4062172146265 (24 lamps)
• Lamp: 125W, 120V AC single-ended halogen, G5.3 base, CC-8 filament
• Optical: 2500 lm, 3200K, Ra 100, 1.248 in light center length
• Nominal Lifetime: 200 hours

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