PRODUCTS – TotalGrow™ HI-Tops

TotalGrow™ HI-Tops


The TotalGrow HI-Top light bar is an ideal, cost-effective fit for greenhouse or indoor top-lighting with rugged construction and a narrow-profile body that mounts easily to support structures. Excellent efficacies are maximized by a versatile and highly effective grow spectrum, minimal shadowing, and optional side reflectors for uniform light delivery. Daisy-chain power and dimming control for low cost installation and operation.

Product Details

  • HI-Top 620
  • HI-Top 320

Specifications Table

Model TG62B3-203
Name HI-Top 620
Power @240V 620W
Output 1734 µmol/s
Light Length x Width x Height 46” x 3” x 3”
(1176mm x 72mm x 77mm)
Driver Length x Width x Height 15″ x 3″ x 2″
(391mm x 70mm x 41mm)
Weight (Light + Driver) 17 lbs. 7.7 kg
AC Daisy – Chain Max. 2@120V / 4@240V / 8@480V

Specifications List

Efficacy: 2.8 µmol/J
Voltage: 100-277V (200-480V available)
Dimming: 0-10V + 12V aux power
Waterproof: IP65
Lifetime: 50,000+ hours
Certifications: ETL, DLC
Warranty: 5 years


Specifications Table

Model TG32B3-203
Name HI-Top 320
Power @240V 320W
Output 895 µmol/s
Light Length x Width x Height 24” x 3” x 3”
(610mm x 72mm x 77mm)
Driver Length x Width x Height
Weight (Light + Driver) 10 lbs. (4.5 kg)
AC Daisy – Chain Max. 4@120V / 7@240V / 14@480V

Specifications List

Efficacy: 2.8 µmol/J
Voltage: 100-277V (200-480V available)
Dimming: 0-10V + 12V aux power
Waterproof: IP65
Lifetime: 50,000+ hours
Certifications: ETL, DLC
Warranty: 5 years



Contact us to discuss your unique set of goals, setup details, challenges, opportunities and questions and receive the ideal configuration of lights, power & control accessories, and incentive assistance. This includes custom light dimensions, spectra, powers, efficacies, and features when standard solutions are not the best fit.

Product highlights

Shorten growth cycles

Optional side-reflector for uniform, efficient edge lighting

Improve yields and quality

Reliably produce year-round

Reduce 40-60% of energy compared to HPS

Long, low maintenance life
Versatile, efficacious, aesthetic spectrum

Excellent light uniformly

Easy installation


Every application is unique, and our lighting experts will gladly provide you with a detailed, custom light plan based on your crops, location, facility, utility incentives, budget, and other factors. General approaches include:

Greenhouse Propagation

Young plants typically require 8+ mol/m2/day DLI for good growth, and a DLI around 14 for more optimized growth. Many greenhouses require approx. 3-10 mol/m2/day of supplemental light as a result. HI-Top 320s on 12’ centers provide 3-4 DLI, and HI-Top 620s provide 6-8 DLI on 12’ centers, 7-10’ above the crops are the most common setups.

Greenhouse Produce

Appropriate supplemental light levels vary significantly by crop and grow style. Ultimately greens and herbs may be lit with 100-150 square feet overage per HI-Top for +4-10 DLI to achieve total DLI levels of 10-17 after sunlight. Strawberries are best with similar or higher levels, e.g. 100 square feet per HI-Top 620. Vining/fruiting crops like tomatoes are best 25-35 total DLI supported by 50-100 square feet per HI-Top 620.

Greenhouse Cannabis

High-yielding cannabis strains in an optimized environment can utilize a DLI up to 60 well, and any flower setup should stay above a DLI of 20 mol/m2/day minimum for success. Depending on goals, incentives, and growth style, 30-50 square feet per HI-Top 620 to add 15-25 to the DLI is generally ideal. Veg and mother areas at half of this concentration are appropriate.

Indoor Cannabis

Single-tier grow rooms easily achieve optimum lighting with HI-Top 620s covering 12-25 square feet per light for 750-1500 µmol/m2/s PPFDs. High-yielding strains in an optimized environment should be grown with 12-16 square feet per light, at least 2 feet above the crop.

What our customers say

One Partner In My Cannabis Facility Build that Went Smoothly

TotalGrow Lights is extremely knowledgeable and easy to work with. A lot of other companies you're dealing with one of their retailers or one of their wholesalers, with TotalGrow you're dealing with the lighting experts of the company directly. It just makes transactions a lot easier and a lot more accurate as far as ship times and delivery times. I never really even had to do anything; they handled it all. They are one partner in my cannabis facility build that went very smoothly and how I wanted it to. I will definitely work with them in the future.

Chris Watt
Co-Founder, True Organics

Five Year Warranty Standard - Couldn’t Ask For Anything More

The customer service is one of the best I’ve ever dealt with. They are to the point, never leave you hanging, call to make sure you received the shipment and everything is working. Also they have a five year warranty standard, that’s the extended warranty with other companies. Saving me that much more money because it’s standard, which makes you realize they have something special. I couldn’t ask for anything more than all that.

Dustin Johnson
Owner/Operator, High Ground Farms

Extremely Pleased With Both Lights & Customer Service

TotalGrow Lights is just so easy to work and collaborate with from planning, ordering, and shipping. They are very good about being responsive and giving good technical background and information, on their website and talking with them, more information than most other grow light companies. Everything ordered came in well and seems very well made. I am extremely pleased with both the lights and customer service.

Grant Kokernak
Ecological Designer, Advanced Grow Labs

Helped Me Incorporate My Existing Lighting

TotalGrow is pretty seamless to work with, better than almost any company I've ever worked with. Their expertise starts in guiding you through the lighting plan development. They don't miss anything. They even helped me with incorporating my existing lighting, which wasn't their product. Honestly, probably the best lighting support I've ever dealt with. I definitely wish more companies could compare to their customer service.

Adrien Alvarez
Director of Cultivation, Stash Ventures

not sure if it fits your need?

We would rather learn the nuances of your goals, setup, challenges, and opportunities and guide you to the ideal lighting solution than have anyone take guesses that could be improved by expert feedback. Tell us what you want to accomplish and let us do the legwork to craft the plan!


Many electric utilities have incentive programs to help you afford energy-efficient upgrades like TotalGrow LEDs. As a Trade Ally with utilities across the county with extensive experience maximizing incentives for our customers and assisting utilities with their programs, we will explore what might be available to make your project more affordable or even fully paid for.