ThinkGrow Model One 4' LED Light Bar | TLB-1

Model One is a modular platform, not a sealed fixture. You build a room from four parts and reconfigure it as the crop changes. Here is how the pieces fit, and where the TLB-1 sits.

A single bar is rarely the whole order. Pick the layout closest to your room and use the list as a parts checklist. Remember the rule: one driver per bar, then link the drivers together.

Starter setup, 2x4 to 4x4 tent

Prefer one click? Choose the Starter 4x4 Kit from the Configuration menu at the top of this page to add every bar, driver, and cord as a single set.

Vertical rack tier, 960W (ThinkGrow's reference layout)

Which daisy-chain cord do I need?

Every Model One bar shares the same mount, 90W draw, and Samsung diodes, so the choice comes down to length and spectrum.

Bar	Length	Channels	PPF	Best for
TLB-1 (this bar)	4 ft	4 (full spectrum, deep red, far red, UV)	270 µmol/s	The default top bar for most rooms
TLB-2	5 ft	4 (full spectrum, deep red, far red, UV)	270 µmol/s	Longer bench rows that need a 5-foot bar
DR-1	4 ft	2 (full spectrum + deep red)	243 µmol/s	Weighting the spectrum toward bloom
FR-1	4 ft	2 (full spectrum + far red)	234 µmol/s	Far-red supplementation for canopy development
ICL-300	4 ft	Full spectrum, built-in 120W driver	360 µmol/s	Inside the canopy, lighting lower bud sites

The TLB-1 runs four independently controlled channels: white full spectrum plus deep red, far red, and UV, all built on Samsung horticulture diodes. With a TLD-4 driver and a TrolMaster controller you can shift the blend from a vegetative recipe to a red-heavy flowering recipe.

TLB-1 spectral output across three efficacy-optimized recipes (up to 3.0 µmol/J). The four channels let you move the blend toward veg or flower.

Each channel dims independently through the four-channel TLD-4 driver, and a TrolMaster controller can automate the blend and photoperiod across an entire room.

If you would rather run one sealed fixture per zone than build a bar array, ThinkGrow's 720W standalone line is the alternative. This is the quick way to decide.

• 1x TLB-1 Model One 4' LED light bar
• 1x TLD-4 driver, when selected in the Configuration option above
• 1x power cord, in the voltage you select

Daisy-chain cords and additional bars or drivers are ordered separately, or bundled in a kit Configuration.

ThinkGrow backs the TLB-1 with a 5-year warranty. If a component fails, the support team diagnoses it by phone or email and ships replacement parts directly, so you do not take down the fixture or wait weeks for an RMA. Trimleaf is an authorized ThinkGrow retailer; this unit ships with the full manufacturer warranty, valid for the original purchaser.