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incandescent sealed beam lamp - par - parabolic aluminized reflector light bulb
4537
donsbulbs part:
4537ST USA
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H
enter quantity:   
quantity discount:
bulb quantity:  1    2+    4+  
price per bulb:  $48    $45.60    $43.32  

4537ST USA
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H

bulb specifications:
  
category: INCANDESCENT SEALED BEAM LAMP - PAR - PARABOLIC ALUMINIZED REFLECTOR
volt: 12.8
amp: 7.81
watt: 100
base: ST2
glass: PAR46
filament: C6
fil.res.: 1.64 ohm
m.o.l.: 3.15 inch (80MM)
d.hours: 25
notes: 200000AIPBCP
SIDE-FILAMENT-SHIELD
aircraft lamp
aircraft landing lamp
aviation lamp
ba:11x6
clear glass
landing lamp
lens:clear
lens:flat
specs verified against ANSI-SR26D2002


typical photo of 4537ST USA
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H bulb type
(your bulb may look slightly different)


typical shape of PAR46 glass envelopes
(not to scale)


typical shape of C6 filament
(not to scale)


industry standards for base:
ST2
(not to scale)


Don's grand wisdom: When multiple bulbs are in a circuit; if one bulb burns out, you really should replace all bulbs at same time. This way all bulbs will look the same. Otherwise, mixing "used" bulbs with "new" bulbs (or mixing brands) will each look different (some will be dimmer, some a different shade of color.) For example, automobile headlights and tail-lights must always be replaced in pairs or they will look odd. And, when one bulb is at it's end of life, the other will be near it's end of life too. Keep good working "used" bulbs as emergency spares.

Although few specialty light bulbs and sockets are manufactured anymore, I have decent inventories of most types in stock, plus additional sources for nearly everything. All are guaranteed brand new, most being NOS (new old stock). Shelf life is forever.

Prices usually rise as inventory is sold off. Website updated daily to reflect current stock and prices. Click add to cart button above, and order at today's prices.

I don't guarantee brand (or country) of manufacture, but you are welcome to suggest a preference. If you do require a certain brand or specific country of manufacture; read my general information.

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Thank you, Don Schnapp


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Definition of light bulb refers to lamp.
Definition of socket refers to lampholder (lamp holder).


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4537ST USA
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H

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4537/13V/100W/ST USA
4537/13V/100W USA
4537/100W/13V/PAR46/SCREW-TERMINALS MICROLAMP
4537/24742 GENERAL-ELECTRIC
4537/PAR-46-13V-100W LAMPTECH
4537 AC-DELCO
4537 EIKO
4537 FLOSSER
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4537 GUIDE
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21999-8
24742-SKU GENERAL-ELECTRIC
24742/4537 GENERAL-ELECTRIC
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31015 OSRAM
46066 EIKO
46066 UPC
274025 GUIDE
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6240009469636
FLOTB4537-LIGHT VERMEER-AUTO-PARTS
FLOTB4537 VERMEER-AUTO-PARTS
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H/4537 USA
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H/4537ST USA
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H 4537ST USA
I/12.8V/100W/ST2/PAR46/25H
I/12.8V/100W/ST2/PAR46/25H/4537 USA
I/12.8V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H/4537 USA
I/12.8V/100W/ST2/PAR46/SIDE-FILAMENT-SHIELD/25H/4537 USA
I/13V/100W/PAR36/2-PIN/PRONG/SPOT-LIGHT/SB4537 LUCAS
I/13V/100W/ST/PAR36/SP/100PAR36PRSP13V DONSBULBS
I/13V/100W/ST/PAR36/SP/100PAR36STSP13V DONSBULBS
I/13V/100W/ST/PAR46/SP/PARTIAL-SHIELDED-FILAMENT/25H
L4537 AC-DELCO
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PAR46-SCREW-TERMINAL-CAP-100W-13V-4537-25-200000-11X6-12-24742 GENERAL-ELECTRIC
RP46S45.37 BAILEY
RP46S4537 BAILEY
SB-4537 LUCAS
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SB4537 LUCAS
TB4537-LIGHT FLOSSER
TB4537 FLOSSER
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4537ST USA
I/12V/100W/ST2/PAR46/BA11X6/SIDE-FILAMENT-SHIELD/25H

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manufacture name:  Bell & Howell
model number #:  1480
model name:  Multi-Motion
size:  8mm
type of equipment:  projector
notes:  only the green one
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