SUNPACK T5HO Replacement Grow Lamp - 48in - 6400K

Direct-Replacement Daylight T5HO Tube to Restore Fixture Output, 48in

T5HO tubes lose output gradually over months of use, often before the drop is obvious to the eye, which means a fixture can be running well below its rated intensity long before a grower notices slower growth. The Sunpack T5HO Replacement Grow Lamp restores full 6400K daylight-spectrum output in a direct bi-pin replacement, so an existing fixture gets back to its original intensity without buying a new fixture.

The 48in length matches standard 48in T5HO fixtures for a straightforward swap, with no adapter or rewiring needed. As a rule of thumb, plan on replacing a T5HO tube every 9-12 months of regular use to keep output consistent from one crop cycle to the next.

Key Features & Benefits

• 6400K full daylight spectrum — the cool, blue-rich spectrum favored for compact, vigorous vegetative growth in seedlings and cuttings.
• High-output T5HO intensity — restores the photon output a fixture is designed to deliver once the original tube has aged and dimmed.
• Direct bi-pin replacement — matches the standard T5HO tube format for the corresponding length, with no adapter needed.
• Roughly 9-12 month service life — matched to a typical continuous-duty grow-room light cycle before output falls off enough to warrant replacement.

Who Should Use This

Home growers and small commercial propagation operations running T5HO fixtures who want to restore full lamp output at the end of a growing season, or whenever plant growth slows despite an otherwise healthy setup, are the right fit for this replacement lamp.

About Sunpack

Sunpack distributes its T5HO replacement lamps through the same greenhouse and hydroponic supply channels that carry its complete strip light kits, aimed at growers maintaining an existing T5HO installation rather than buying new fixtures.

Frequently Asked Questions

How do I know when my T5HO lamp needs replacing?

T5HO tubes lose output gradually, often long before the dimming is visible to the eye, so growth rate is usually the first sign something has changed. Replacing tubes on a fixed schedule, roughly every 9-12 months of regular use, catches the decline before it shows up in the crop.

Is 6400K the right spectrum for every growth stage?

6400K daylight spectrum favors vegetative growth, seed starting, and propagation. For flowering stages many growers prefer a warmer 3000K tube instead, and some run 6400K through propagation and veg before switching crops to a different light for flowering.

Can I mix this lamp with other T5HO tube brands in the same fixture?

Yes, standard T5HO bi-pin tubes of the same physical length are interchangeable across brands within a fixture. For the most even light output across a multi-lamp fixture, replace all the tubes at the same time rather than mixing old and new.

Will this lamp fit any T5HO fixture?

It fits any fixture built for a standard bi-pin T5HO tube of the matching length, regardless of fixture brand. Confirm your fixture uses T5HO rather than standard-output T5, T8, or T12 tubes before ordering, since those formats are not interchangeable.