Are the prongs flat or rounded

The pins of an FCS bulb, regardless of brand are round. An FCS bulb has what is called a G6.3 Base Type. The pins are 6.3mm apart from one another measured on center and the the pin diameter can vary slightly between .95mm and 1.05mm diameter and still be within spec. The pins are round.

Does this work with outdoor landscape lighting which I think is 12v but I'm not sure.

For more than one reason, the answer is no. The FCS bulb is rated to operate at 24 Volts. If you have a 12 Volt system, meaning 12 volts at the socket, if you install the FCS bulb which is rated to operate at 24 volts, it will barely come on if at all. If it did come on, it would be very very dim. A second reason the FCS would not be a good choice for your application is the life hours. Even if the voltage was compatible, a FCS bulb is designed for use as a medical or optical device bulb and has an average rated life of only 50 hours. Even if the voltage were compatible, the FCS would be a very poor choice as it would burn out frequently. In contrast a typical bulb designed for landscape lighting would have a life hour rating of 2000 hours. To make a proper choice for a bulb for your landscape lights, first be certain of the voltage required at the socket, and second, know the maximum rated wattage recommended for the fixture and third, the base type required so that the bulb can be properly installed in the socket of the light.

Osram Fcs 64640 Hlx 150w 24v Tungsten Halogen Lamp

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Description

💡 Illuminate your precision — never settle for less than brilliance!

HLX TECHNOLOGY BOOST - Delivers 10% more brightness than standard halogen bulbs for sharper clarity
TRUSTED OSRAM QUALITY - Over 100 years of innovation guarantees premium performance and long-term value
VERSATILE APPLICATION - Perfect for microscopy, surgical lighting, fiber illumination, and diagnostics
COMPACT DURABLE DESIGN - T3 tubular shape with tungsten filament built for 50 hours of dependable use
PRECISION FILAMENT ALIGNMENT - Ensures consistent, reliable light for critical medical & scientific tasks

The OSRAM FCS 64640 HLX is a 150W, 24V tungsten halogen lamp featuring advanced HLX technology that boosts luminous efficacy by 10%. Designed with precision filament alignment, it delivers consistent, high-quality light ideal for demanding medical and scientific applications such as microscopy and surgical lighting. Compact and reliable, this lamp offers 50 hours of operation backed by OSRAM’s century-long expertise in specialty lighting.

Specifications

ASIN	B0711LMWMK
Accepted Voltage Frequency	100 to 240 Volts and 50 Hertz to 60 Hertz
Additional Features	Voltage
Best Sellers Rank	#34,856 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #164 in Halogen Bulbs
Brand	OSRAM
Brand Name	OSRAM
Bulb Base	G6.35
Bulb Shape Size	T3
Color	Silver
Color Rendering Index	100
Control Method	App
Controller Type	Push Button
Customer Reviews	4.5 out of 5 stars 865 Reviews
Global Trade Identification Number	04050300006727
Incandescent Equivalent Wattage	150 Watts
Included Components	Bulb
Indoor Outdoor Usage	Indoor
Item Dimensions W x H	1.38"W x 2.05"H
Item Weight	9 Grams
Light Color	white
Light Output Maximum	97200 Lumens
Light Source Operating Life	50 Hours
Light Source Type	Halogen
Light Source Wattage	150 Watts
Light Type	Halogen
Manufacturer	OSRAM
Manufacturer Part Number	54263
Manufacturer Warranty Description	30 days.
Material Type	tungsten, fiber, Tungsten
Model Name	54263
Model Number	54263
Number of Items	1
Package Quantity	1
Power Consumption	150 Watts
Power Source	Corded Electric
Shape	Tubular(T)
Special Feature	Voltage
Specific Uses For Product	Lamp
Style Name	Classic
Unit Count	1.0 Count
Voltage	24 Volts
Wattage	150 watts
White Brightness	97200 Lumens

Reviews

C**A

9.01.2026

M**N

6.12.2022

L**I

5.12.2025

C**E

14.10.2023

K**Y

4.04.2013

A**R

12.08.2021

K**Y

15.06.2023

R**A

11.12.2025

S**A

25.02.2024

H**0

10.02.2026

P**E

5.04.2026

R**6

28.12.2024

E**O

27.01.2026

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OSRAM FCS 64640 HLX 150W 24V Tungsten Halogen Lamp

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