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U-bend T8 fluorescent tube, 22.5 inches, medium bi-pin base

GE Lighting

GE Lighting 72118 F31T8/SPX35/U/ECO U-bend T8 U shaped fluorescent U tube

SKU CH-GS17-08DXC

31-watt U-bend T8 fluorescent tube delivering 2725 lumens at 3500 K with Ecolux technology

  • Power rating31
  • Product typeFluorescent Tubes
  • 3500K natural white suits offices and retail
  • Ecolux low-mercury design reduces environmental impact
  • 2725 lumens from 31 watts gives efficient output
  • 5 inch U-bend fits standard Mod-U-Line fixtures
  • Medium bi-pin G13 base allows simple replacement

GE 72118 U-bend T8 fluorescent lamp

The GE 72118 is a 31 watt U-bend T8 fluorescent tube with a medium bi-pin G13 base. It delivers 2725 lumens at 3500K natural white colour temperature and measures 22.5 inches in length. The lamp uses Ecolux low-mercury technology and belongs to the Mod-U-Line series.

Suits fixtures that accept F31T8/U lamps

This lamp fits commercial or industrial fixtures designed for 31 watt U-bend T8 tubes with G13 bases. It is not for installations that require straight T8 tubes, different wattage ratings, or alternative colour temperatures. Buyers needing dimmable operation or instant-start compatibility should verify ballast specifications before purchasing.

31 watt power rating determines ballast match

The 31 watt rating is the critical specification that must match the ballast in the fixture. Using this lamp with a ballast rated for a different wattage will cause poor performance or premature failure. Confirm the ballast label reads F31T8 or 31 watt U-bend before installation.

How it compares

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

Price $16.99
Cheaper than about 78% of the 491 comparable items (median $28.99).

Specifications

Product
Brand nameGE
Product typeFluorescent Tubes
Power
Power rating31

Questions about this item

What length and base does the 31 watt F31T8 U-bend tube need to fit my fixture?

The tube measures 22.5 inches overall and uses a Medium Bi-Pin G13 base on each leg, so the fixture must accept that pin spacing and overall length.

How do I install the G13 bi-pin U-bend tube without damaging the pins?

Align both pins with the lampholder slots, push straight in until seated, then rotate a quarter turn to lock; forcing the tube sideways bends the pins and causes poor contact.

When should I replace the 2725 lumen Ecolux tube to maintain light quality?

Replace the tube when output drops noticeably or the ends darken, as the 3500K phosphor degrades over time and colour shift affects task lighting.

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