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Long, silver bar grow light with black end caps, on white background.
A white, high-intensity LED grow light bar suspended by wires.
TotalGrow 620W High Intensity LED grow light bar, aluminum with black end caps, suspended by wire hangers.
A 620W LED grow light bar with a silver heatsink and black cables hangs from wires.
Graph showing photonic distribution vs wavelength (nm). Peaks at ~450nm and ~660nm.
Hydroponic lettuce growing in a greenhouse with bright lights and fans overhead.
Long, silver bar grow light with black end caps, on white background.
A white, high-intensity LED grow light bar suspended by wires.
TotalGrow 620W High Intensity LED grow light bar, aluminum with black end caps, suspended by wire hangers.
A 620W LED grow light bar with a silver heatsink and black cables hangs from wires.
Graph showing photonic distribution vs wavelength (nm). Peaks at ~450nm and ~660nm.
Hydroponic lettuce growing in a greenhouse with bright lights and fans overhead.

TotalGrow High Intensity Top-Light 620W Bar LED Grow Light

Official TotalGrow Dealer
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starting from 0% interest financing from /mo.

Payment Options

Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Must apply on a desktop device.
Schedule:Flexible
Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
Looking to finance equipment under your corporation? Learn more about Business Financing
  • 620W delivers 1,734 µmol/s at 2.8 µmol/J
  • Passively cooled fanless design with IP65 rating
  • 5-year limited manufacturer warranty from the original date of purchase
  • View More Details

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  • Free Shipping On Most Items*To the lower 48
  • Transparent PricingBacked w/ price match guarantee
  • 4.8/5 Top Quality Store on Google
  • Secure CheckoutSSL encrypted payments

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VOLUME PRICING

Commercial & Bulk Purchasing

We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.

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THROUGH THE Cultivator's LENS Highlights

  • You are upgrading your greenhouse or indoor facility because you need serious photon output without the heat load and power draw of HPS.
  • You are setting up supplemental lighting because you want a balanced full-spectrum diode mix over greenhouse sun.

  • The driver hangs on its own brackets, separate from the light, so the bar stays slim and casts minimal shade in greenhouse installs.
  • The IP65-rated bar is suitable for dry, damp and wet locations.

  • Operators using the daisy-chain feature say sharing power across multiple bars cut down the number of drops and circuits they needed to run.

TotalGrow High Intensity Top-Light 620W Bar LED Grow Light

The TotalGrow HI-Top 620 is a 46-inch LED top-lighting bar for commercial greenhouses and indoor farms that need serious photon output without the heat load and power draw of HPS. At 620 watts it delivers 1,734 µmol/s at 2.8 µmol/J. Its balanced full-spectrum diode mix works as supplemental lighting over greenhouse sun or as the sole light source in a closed grow room.

The fixture is passively cooled, with no fans or moving parts to fail. The IP65-rated bar is suitable for dry, damp and wet locations. The driver hangs on its own brackets, separate from the light, so the bar stays a slim 3" × 3" and casts minimal shade in greenhouse installs. With 0-10V dimming you can match intensity to each crop stage or tie the fixture into a central lighting controller. A 12V auxiliary output can power controller accessories.

For larger build-outs, optional linking cords share AC power between fixtures: up to 2 bars on 120V, 3 on 208V, or 4 on 230–277V. That means fewer drops and circuits to run. TotalGrow estimates a 40–60% energy reduction compared to HPS. If you're comparing bar formats, the newer TotalGrow High Intensity Top-Light 660W Bar packs its output into a shorter 43-inch, IP66-rated body. You can also browse the full lineup of TotalGrow commercial grow lights for under-canopy, vertical-rack and propagation options.

Features

⚡
1,734 µmol/s at 2.8 µmol/J

620W of high-efficiency output for high-light crops and wide greenhouse coverage.

🌈
Balanced Full Spectrum

Works as supplemental or sole-source light across propagation, leafy greens, fruiting crops and cannabis.

🎚️
0-10V Dimming

Dial in intensity by crop stage or connect to a lighting controller, with 12V aux power on board.

💧
IP65, Fanless Design

Passively cooled with zero moving parts and rated for dry, damp and wet locations.

🔗
AC Daisy-Chain Linking

Share power across 2 bars at 120V or 4 at 240V with optional linking cords.

🪞
Side Reflector Add-On

Optional clip-on reflector redirects light inward on edge rows for more uniform coverage.

What's Included

  • 1x HI-Top 620 LED light bar
  • 1x 100–277VAC driver unit
  • 1x DC power cord (light bar to driver)
  • 2x Light fixture mounting brackets
  • 2x Driver mounting brackets

Specifications

Specification Value
Power Consumption 610W @ 115V / 620W @ 230V / 630W @ 277V
Photon Output (PPF) 1,734 µmol/s
Efficacy 2.8 µmol/J
Spectrum 203 – Balanced Full Spectrum
Coverage (Sole Source) 4' × 4' (16 sq ft) at 1,000 µmol/m²/s
Coverage (Greenhouse Supplemental) Up to 70 sq ft at 225 µmol/m²/s
Input Voltage 120–277VAC nominal (108–305VAC range), 50/60 Hz
Max Input Current 5.4A @ 115V / 2.7A @ 230V / 2.4A @ 277V
Power Factor >0.90
Dimming 0-10VDC (0.5V dim-off threshold)
Auxiliary Power 12V, 300 mA
AC Daisy-Chain Limit 2 @ 120V / 3 @ 208V / 4 @ 230–277V
Cooling Passive (no fans or moving parts)
Ingress Rating IP65; dry, damp and wet locations
Max Ambient Temperature 104°F (40°C)
Light Bar Dimensions 46" × 3" × 3" (1176 × 72 × 77 mm)
Driver Dimensions 15.3" × 2.8" × 1.7"
Weight 17 lbs total (11 lb bar + 6 lb driver)
Supply Conductors Min. 90°C rated
Service Life 50,000 hours
Certifications ETL Listed, DLC Horticultural; Photobiological Risk Group 1 (EN62471)

Spectrum Analysis

TotalGrow High Intensity Top-Light 620W Bar LED Grow Light Spectrum Analysis

Warranty

The TotalGrow High Intensity Top-Light 620W Bar is covered by a 5-year limited manufacturer warranty from the original date of purchase.

Frequently Asked Questions

What's the difference between the 120V and 240V options? +

Both options use the same fixture and universal 100–277VAC driver. The main practical difference is power sharing. On 120V, linking cords can connect up to 2 bars per AC feed. On 240V you can link up to 4, and current draw per fixture drops from 5.4A to about 2.7A.

How does the HI-Top 620 compare to the TotalGrow 660W bar? +

The HI-Top 620 runs at 2.8 µmol/J and puts out 1,734 µmol/s from a 46" × 3" × 3" bar with IP65 protection. The newer TotalGrow 660W Top-Light Bar is shorter at 43" × 3" × 4", with an IP66 rating. It comes in a standard version (1,685 µmol/s at 2.5 µmol/J) and a high-efficiency version (1,865 µmol/s at 2.9 µmol/J). Both share the same linking limits, 0-10V dimming and a 5-year warranty.

Are power cords included? +

The DC cord that connects the light bar to the driver is included, along with mounting brackets for both. AC power cords, AC linking cords and M12 dimming/data cords are sold separately, so you can order the plug type and lengths your layout needs.

How high should I hang the HI-Top 620? +

It depends on your target intensity. For high-light sole-source growing (around 1,000 µmol/m²/s), TotalGrow suggests about 3 ft above the canopy with 4 ft spacing. Supplemental greenhouse lighting typically mounts 5–15 ft up. Keep at least 1 ft between the fixture and the canopy, and at least 2 inches between the fixture and the ceiling for heat dissipation.

Will it work with my lighting controller? +

The HI-Top 620 accepts standard 0-10V dimming through its M12 data port, with a 0.5V dim-off threshold. It also supplies 12V auxiliary power (300 mA). Check your controller's 0-10V compatibility and maximum daisy-chain count before wiring, and do not exceed it.

Can it be used in humid greenhouses? +

Yes. The light bar is IP65-rated and suitable for dry, damp and wet locations, and its fanless design has no moving parts to corrode. It should never be sprayed or washed, and nutrient solution must not build up on it, since that voids the warranty. Clean dust off with low-pressure compressed air only.

Do I need an electrician to install it? +

TotalGrow recommends installation by a qualified licensed electrician, wired to the National Electrical Code and local codes with proper grounding. Keep ambient temperature below 104°F (40°C) during operation. The fixture is a Photobiological Risk Group 1 product, so avoid staring directly at the lit LEDs.

Is there a 480V version? +

Yes. TotalGrow makes a separate HI-Top 620 HV model with a 200–480VAC driver, which can link up to 8 fixtures at 480V. This listing covers the standard 100–277V model. Contact us if your facility runs on 480V, or browse our TotalGrow lighting collection for other fixtures.

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