ThinkGrow Model-H LED Grow Light 630W | 1,700 µmol/s, Red Channel, TrolMaster

ThinkGrow Model-H 630W: Two Controls, One Canopy

The Model-H has two on-board controls, and the second one is the reason to pick it. One control dims the whole fixture, while the other raises or lowers a separate 660nm deep red channel over the full-spectrum white. Eight bars click into a central driver, drawing 630W for 1,700 µmol/s at 2.7 µmol/J. The frame spans 45 x 44.6 x 4.44 in and weighs 38.8 lbs. Input auto-senses 100–277V, drawing 5.24A at 120V, 2.67A at 240V and 2.35A at 277V, with a power factor of at least 90%. One independent review metered about 675W on a sagging 112V line, so size breakers with headroom. Heat load runs near 2,150 BTU/h per fixture. TrolMaster rates the minimum mounting height at 6 in above canopy, which suits tight vertical racks. The build is IP56 and ETL listed, with an L90 life above 54,000 hours. It carries a 5-year standard warranty.

Running an Adjustable Spectrum LED Through Veg and Flower

In veg, most growers keep the red channel low and let the white carry compact, tight internodes. Once flower sets, turning the red up adds photons where the plant uses them most without changing the white intensity. In a 4x4 tent, that same reviewer found the sweet spot at roughly a foot to a foot and a half above the tops. The same fixture can stretch to a 5x5 when run at full over a flowering canopy. For a room of these, the TrolMaster Hydro-X and an LMA-T adapter take over dimming, scheduling and spectrum. A single adapter drives a long daisy chain and splits it into ten separate groups. That lets a veg bench and a flower bench share one controller with different recipes. There are two honest limits worth knowing. The bars have a little play where they click in, so a bumped fixture can rock slightly. The dimmer percentage also does not track wall watts in a straight line, so meter the draw instead of trusting the setting.

Key Features

• 1,700 µmol/s at 2.7 µmol/J: Full flowering intensity over a 4x4 and enough reach for a 5x5 when run at full.
• Separate 660nm Deep Red Channel: Raise the red for flower or pull it back in veg without touching the white output.
• Eight Click-In Bars, One Driver: Bars snap into the center driver, so a single bar can be swapped without rewiring.
• TrolMaster Hydro-X Control: The LMA-T adapter runs 256 fixtures per daisy chain across up to ten groups.
• Auto-Sensing 100-277V: The same fixture moves between 120V, 240V and 277V circuits without a driver swap.
• 6 in Minimum Mounting Height: Tight clearance works in vertical racks where tiers sit close together.
• IP56 and ETL Listed: Handles humid rooms and carries the ETL listing inspectors look for on commercial builds.

Technical Specifications