4 Foot Dimmable/CCT Tunable LED Tube 18 Watt 2450–2700 Lumens 3500K/4000K/5000K 80+ CRI Energy Star Rated 120–277V / Ballast Dependent

What does “ballast dependent or 120–277V” mean for installation?

It indicates the tube may be usable in two ways depending on the fixture and wiring: either operating on a compatible existing ballast (ballast dependent) or operating on direct line voltage (120–277V) after a ballast-bypass wiring method. Verify the intended installation type before ordering and follow the fixture’s wiring instructions.

How is dimming handled on a dimmable LED tube?

Dimming behavior depends on the driver method. If installed on a dimmable ballast, dimming is controlled by the ballast/fixture system. If installed on line voltage with an internal driver, dimming compatibility depends on the specific driver and control type used. Confirm the dimming method (ballast-dim vs line-voltage dim) for the application.

How do I select between 3500K, 4000K, and 5000K?

3500K is a warmer neutral tone often used in customer-facing or mixed-use spaces, 4000K is a common “standard neutral” for offices and corridors, and 5000K is a cooler white often used where higher contrast is preferred. Selection method varies by product (switch, end-cap setting, or ballast/control behavior), so confirm how CCT is set on this model.

Is 2,450–2,700 lumens typical for an 18W 4-foot tube?

Yes. That output range is consistent with many 4-foot LED tube retrofits used to replace fluorescent lamps in troffers and strip fixtures. Delivered light will also depend on fixture optics, lensing, and the existing reflector condition.

What does the G13 base tell me, and what listings does it carry?

G13 (medium bi-pin) is the standard base for many linear 4-foot fluorescent-style lamps, so it fits common lampholders designed for that format. This tube is UL Listed and carries FCC/RoHS compliance plus an Energy Star rating, which can be relevant for safety, EMC, and efficiency requirements.