SunBlaster T5 to LED Conversion Lamp 42W, 6400K, 48"

Bring LED Output to an Existing T5HO Fixture, 48in 42W

Replacing an aging T5HO fluorescent fixture outright means buying a whole new housing, ballast, and reflector, when in many cases the fixture itself is still in good shape and only the lighting technology is dated. SunBlaster's T5 to LED conversion lamp swaps into an existing T5HO fluorescent fixture in place of the fluorescent tube, bringing LED output and a longer service life to hardware already mounted and wired.

At 48 inches and 42 watts, this lamp fits standard 4-foot T5HO fixtures, giving growers running a full-length bench a straightforward path to LED output without replacing the fixture itself.

Key Features & Benefits

• Drop-In T5HO Fixture Fit — swaps into a compatible T5HO fluorescent fixture without rewiring.
• 6400K Full-Spectrum LED Output — cool-leaning light suited to vegetative growth and propagation stages.
• Zero Mercury Content — unlike a fluorescent tube, so there's nothing hazardous to manage at disposal.
• ~35,000-Hour Rated Lifespan — well beyond a typical fluorescent tube's service life before dimming.
• UL Listed — evaluated to UL's safety standards for electrical products.

Who Should Use This Conversion Lamp

This lamp fits a grower with an existing T5HO fixture in good working condition who wants LED output and a longer service life without replacing the housing, ballast, or reflector. It's a lower-cost, lower-effort path to LED than swapping the entire fixture.

About SunBlaster

SunBlaster, based in Langley, British Columbia, builds T5HO and LED grow lighting for indoor and greenhouse propagation, sold through horticultural retailers. Its T5 to LED conversion lamps are built to work with the company's own T5HO combo fixtures as well as most remote electronic-ballasted T5HO housings from other manufacturers.

Frequently Asked Questions

How do I install this conversion lamp?

The lamp swaps directly into a compatible T5HO fluorescent fixture in place of the existing fluorescent tube, using the same pin sockets, so no rewiring is required. Confirm the fixture uses a remote electronic ballast before ordering, since some T5HO fixture designs aren't compatible with an LED conversion lamp.

Will this lamp work in any T5HO fixture?

It's built to work with SunBlaster's own T5HO combo fixtures and most remote electronic-ballasted T5HO fixtures from other manufacturers, but not every T5HO ballast design is compatible with an LED conversion lamp. Checking the ballast type before ordering avoids a lamp that lights unevenly or not at all.

Why convert to LED instead of just replacing the fluorescent tube?

A fluorescent replacement tube typically lasts around 10,000 hours before output fades noticeably, while this LED conversion lamp is rated for roughly 35,000 hours, meaning far fewer lamp changes over the life of the fixture. It also removes the mercury content that fluorescent tubes contain, which matters for disposal.

Is this lamp safe to use continuously in an indoor grow space?

Yes, the lamp is UL Listed, meaning it has been evaluated against UL's safety standards for electrical products. As with any grow light, keep the fixture's wiring and cord in good condition and avoid running it in standing water or excessive humidity.

Does converting to LED change how close I can mount the fixture to plants?

LED lamps generally run cooler than fluorescent tubes, which can allow slightly closer mounting, but the fixture's existing reflector and housing still set the practical limits. Start at the same distance used for the fluorescent tube and adjust based on how the canopy responds over the first few days.