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Four small UV-C fluorescent bulbs with two-pin G23 bases in a clear pack

Baldwin 4 Pack 5W UV-C Bulb LB4000 G23 Base

SKU CH-4MP6-3GQTX

Four 5 W UV-C bulbs with G23 bases fit listed GermGuardian air purifiers; replace every 10 to 12 months

  • Power rating5 W
  • ANSI baseg23
  • Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
  • Lamp toneCool
  • Product typeFluorescent Lamp Sleeves
  • Size or dimensions5.51 in × 5.51 in × 1.97 in
  • UV-C light reduces volatile organic compounds without ozone production
  • Four 5W replacement bulbs included for multiple purifier units
  • G23 2-pin base fits GermGuardian LB4000 and compatible models
  • Bulbs last 10 to 12 months before replacement is recommended
  • Effective at isolating pollen and dust mites in air purifiers

Baldwin 4 Pack 5W UV-C Bulb

This four-pack supplies 5 W UV-C replacement lamps with a G23 two-pin base. They are built for GermGuardian air purifiers including the LB4000, AC4300BPTCA, AC4825, AC4850, AC4850PT, AC4900, AC4900CA, AC5300B, AC5350B and AC5350W models. Each bulb measures 5.51 by 5.51 by 1.97 inches.

Capacity and replacement cycle

Four bulbs cover multiple purifiers or provide a full year of spares when each unit is swapped every 10 to 12 months. The 5 W output handles standard room volumes but will not scale to large commercial spaces. Buyers needing higher-intensity UV-C for bigger areas should look elsewhere.

Build and day-to-day fit

The fluorescent sleeves install directly into the purifier's G23 sockets without tools. Cool lamp tone keeps visible light low while the UV-C reacts with titanium dioxide to cut volatile organic compounds without producing ozone. Bulbs also trap pollen and dust mites during operation.

How it compares

Measured against everything we stock in Lighting Fixtures & Bulbs, at today’s prices. Recalculated every night.

Price $27.99
Typical for this category: the median of 491 items is $28.99.

Specifications

Product
Brand nameBaldwin
Part numberAQ-217L-TM4J
Product typeFluorescent Lamp Sleeves
Power
Power rating5 W
Size & build
Size or dimensions5.51 in × 5.51 in × 1.97 in
Overall length5.51 L x 5.51 W x 1.97 H inches
Compatibility
Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
More details
ANSI baseg23
Lamp toneCool

Questions about this item

Will these 5W G23-base bulbs fit the GermGuardian AC4825 purifier I already own?

Yes, the bulbs are compatible with the AC4825 and other listed GermGuardian models including AC4850, AC4900 and AC5350W.

How can I confirm the UV-C output is still effective after installing the four bulbs?

Replace the bulbs every 10 to 12 months as recommended; a visible blue glow through the purifier's viewing window indicates the lamps are powered and emitting UV-C.

Does the pack include any mounting hardware or do I need to buy a G23 socket separately?

The package contains only the four 5W LB4000 bulbs; no extra hardware or sockets are included.

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