AC Infinity IONBOARD S33 260W LED Grow Light

The AC Infinity IONBOARD S33 is a 260W full spectrum LED grow light designed for complete 3' x 3' grow coverage. It uses horticulture series Samsung LM301H diodes with an optimized full spectrum and algorithmically positioned LED layout to deliver strong canopy penetration and more uniform PAR distribution across the growing area.

The current generation S33 has been updated from the older 240W LM301B configuration still shown by some retailers. AC Infinity's current manufacturer listing specifies 260W output and Samsung LM301H diodes, so those are the specifications used for this product page.

• Power: 260W Full Spectrum LED
• Coverage: 3' x 3' Grow Area
• Diodes: Samsung LM301H
• Controls: 0–100% Dimming + UIS

The fixture also includes integrated 0 to 100% dimming, fanless aluminum thermal management, IP65 protection, and compatibility with AC Infinity's UIS smart control ecosystem for scheduling, automated grow cycles, and app based control.

260W High Output Design

The current IONBOARD S33 operates at 260 watts, providing the intensity needed for a complete 3' x 3' grow footprint.

This updated output gives the current S33 more power than the earlier 240W version while keeping the same compact square board format.

Important: the 260W current manufacturer specification is used here rather than the older 240W retailer data.

Samsung LM301H Diodes

The current S33 uses Samsung LM301H horticulture series LEDs.

These diodes are designed specifically for horticultural applications and provide efficient full spectrum output suitable for every major stage of plant development.

The current light combines 3000K and 6500K white wavelengths for a broad spectrum that can be used from germination through flowering.

Full 3' x 3' Coverage

The IONBOARD S33 is designed around a 3' x 3' grow footprint.

Its square form factor closely matches common 3' x 3' grow tents, helping provide edge to edge lighting without requiring an oversized fixture.

This makes it well suited to growers who want one primary light for a complete medium sized tent.

Optimized Full Spectrum

The S33 uses a horticultural full spectrum designed for use throughout the plant lifecycle.

Its combination of warm and cool white wavelengths supports germination, seedlings, vegetative growth, and flowering.

This allows growers to keep the same fixture in place throughout the full grow instead of switching between separate veg and bloom lights.

Algorithmically Positioned LEDs

AC Infinity positions the diodes according to an optimized pattern rather than a basic evenly spaced grid.

This arrangement is designed to improve PAR uniformity, edge coverage, canopy penetration, and overall light distribution.

The goal is to reduce excessive center intensity while delivering more useful light toward the perimeter of the 3' x 3' footprint.

0–100% Dimming

The proprietary LED driver provides 0 to 100% brightness control.

The onboard dimmer adjusts intensity in 20% increments, allowing the fixture to be scaled to different plant stages.

Lower power settings can be used for seedlings and younger plants, while output can be increased as the canopy develops.

UIS Smart Controller Compatible

The S33 is part of AC Infinity's UIS platform.

Connecting the fixture to a compatible UIS controller unlocks additional automation features including lighting schedules, automated grow cycles, environmental triggers, app control, remote monitoring, and advanced programming.

Compatible options include the Controller 69 Pro, Controller 69 Pro+, and Controller AI+.

AC Infinity App Control

When connected through a compatible UIS controller, the S33 can be managed through the AC Infinity app.

Growers can adjust schedules and lighting behavior remotely while integrating the fixture with other compatible AC Infinity equipment such as inline fans and circulation systems.

This allows the grow light to operate as part of a broader automated environment rather than as an isolated fixture.

Daisy Chain Support

The proprietary driver includes connectivity for linking the S33 with additional lighting equipment.

Multiple compatible fixtures can be paired through expansion accessories, helping growers scale their setup while keeping lighting controls centralized.

Expansion dongles may be required depending on the final configuration.

Fanless Thermal Management

The IONBOARD S33 uses a fanless unibody aluminum board to dissipate heat.

The fixture body functions as a large passive heatsink, allowing heat to spread across the aluminum surface without requiring active cooling fans.

This reduces operating noise and eliminates one of the primary moving components found in actively cooled lighting fixtures.

IP65 Construction

All major fixture components are sealed to IP65 standards.

This helps protect the light against dust and moisture exposure associated with humid grow tent environments.

The sealed design also helps maintain performance in areas where temperature and relative humidity are higher than normal household conditions.

Compact Square Design

The S33 uses a square board format designed specifically around 3' x 3' spaces.

Older published specifications list the fixture at approximately 18.5" x 18.5", making it substantially smaller than the canopy area it is designed to illuminate.

This leaves room around the fixture for ventilation equipment and circulation inside the tent.

Optional Smart Controllers

The S33 can be purchased on its own or bundled with a compatible AC Infinity UIS smart controller for added automation.

Controller 69 Pro — Independent programming UIS controller.

Controller 69 Pro+ — Independent programming UIS controller with 8-port connectivity for larger setups.

Controller AI+ — Environmental controller with AI powered learning and dynamic level adjusting.

What's Included

• AC Infinity IONBOARD S33 LED Grow Light
• Proprietary LED Driver
• Pair of Metal Bar Hangers
• Rope Hangers

Compatible UIS smart controllers and expansion accessories are sold separately.