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Osram 64640 (FCS) 24v 150w G6.35 Microscope Halogen Bulb

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Product Specification

: Home & Lifestyle  >  Lighthing  >  Specialty Lighting
: Osram
: 64640 FCS
: 64640 FCS
Dimension (Length x Width x Height)
: 11.00 x 7.00 x 7.00
: 0.70
Manufacturing Country
: Not Specified
Warranty Type
: No Warranty
Warranty Value
: -
Warranty Description
: -
Ship From
: Kuala Lumpur

Product Description

FASTlite - Master stockist in Malaysia for Philips, Osram, GE, Hanaulux Blue, Dr Fischer lamps.





The Osram 64640 (FCS) Halogen Bulb is sometimes referred to as "HLX64640" which means that the bulb has Zenophot gas which replaces the krypton gas that is normally in most halogen light bulbs. This is considered by many customers to produce brighter light.

HLX XENOPHOT™ Technology for Improved Performance

The HLX identifies lamps that employ XENOPHOT™ technology, an innovation first introduced by OSRAM. In XENOPHOT lamps, krypton—the normal fill gas used in halogen lamps—is replaced with xenon gas. The xenon reduces the rate of tungsten vaporization and allows for a higher filament temperature. Depending on the application, XENOPHOT can either improve luminous efficacy or can extend the lamps service life.

The ANSI (American National Institute of Standards)code for this light bulb is (FCS) and can be bought by many microscope dealers globally. Specialty Optical Systems has been distributing both the 64640 and FCS types of bulbs to microscope dealers and end-users for over 20 years. The bulb is typically in stock and ships the same day.

Light Bulb Technical Specifications:

- Watts: 150 Watt
- Volts: 24 Volt
- Base: GY6.35
- Avg. Life Hours: 50 Hours
- Shape: T4
- Type: Halogen

Cross Reference and Key Words:

Microscope, Scientific, Medical, and Dental Applications: OSI 64640, Osram/Sylvania 64640, Osram/Sylvania HLX, GE FCS, Philips FCS, Ushio FCS, Philips 7158, 7158 Philips, 64640 Osram, 190600, Efos 4075, 54444, Type 7158 A1/216, BLV537, 1403, JQ-240, Type 7158, IQ Hanimex A1/216 G6.35 FU-2852, 20607-8, 54041, HLX 64640, 64640HLX, HLX64640, 54041-0, 006727, 151600-4, 4075, 10404, 4070, Leitz 037-717, Nikon 71826, Canon MH7-3001, A216, A-216, O1157-001, 01157-001, 471-027, 041-179-01, 2063, 190600 B&H Bell and Howell, Bruning 09-810, P/N 04117901, A1216, 50520, Leitz 037-717

Equipment Used In: This bulb is used in the following equipment:

Astrascope 3000/2
Minolta RP504, RP509
Nikon Microscope 71826
Swift Microscope MA786
Zeiss Ikon-Voigtlander Automat Perkeo
Zeiss AF Automat Perkeo,
Zeiss AJ24 Ikolux
Zeiss J150 Automat Perkeo
Zeiss P500
Zeiss P510 Automat


Being in the Microscope Business for over 25 years Specialty Optical has seen all kinds of specialty bulbs that need replacement in optical systems. From multi-million dollar photolithography machines to simple student microscopes there are some basic guidelines that can be followed to ensure safety and extend the life of the bulb.


If you have trouble finding your bulb, try searching the web with the model number of the scope or any other information you know about the light bulb. There are many light bulb distributors globally but it is a good idea to buy a microscope bulb either from the scope manufacturer, a microscope dealer, or a “specialty” bulb distributor. These bulbs (sometimes referred to as “lamps”) are not household bulbs and if not sourced correctly can result in lost time and lost money. We have seen such things as filament spacing, arc positioning, base seating, and poor ceramic potting as issues. Another issue we hear is pricing discrepancies. Once again, buy from a reputable source - when there is an issue with the performance of the microscope or light bulb the retailer or web site will not know how to correct the problem.


Locate the microscope manual. It is always a good idea to follow the steps within the manual. Some microscope manuals have detailed graphics that show where the light bulb is located and how to replace it.

Make sure the microscope has been off for at least 30 minutes. Some of these light bulbs burn extremely hot and can cause severe burns.

When removing the light bulb, be very careful when taking it out of the socket. Some sockets are made out of ceramic that can be fragile. You may require a screwdriver to remove the illuminator in order to get to the light bulb.

Compare the removed light bulb with the new bulb. There are so many different types of bulbs and manufacturers of bulbs that even the slightest change may affect the optics of the microscope. It is also a good idea to keep the light bulb for future reference.


Never touch the glass of the light bulb especially if you are replacing a mercury short arc, xenon, or halogen bulb. The oil from your skin increases the surface temperature of the bulb causing the light bulb to a have shorter life. Use a cloth or request an optical cloth for bulb replacement. We can send you one if requested free of charge when buying a bulb from us.

Reverse the procedures when you removed the burnt out light bulb and reattached the illuminator. Some higher end microscopes require filament alignment. There should be adjustment screws that change the “X” and “Y” axis for proper performance.


Most bulbs can simply be thrown away but some microscope bulbs require proper disposal. If you are replacing a mercury, xenon, or fluorescent bulb, contact the distributor to ensure proper disposal methods.

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