Growcraft ULTRA – 330 Watt DIY LED Grow Light Kit

5.00 out of 5
3 customer reviews
(3 customer reviews)


Temporarily Unavailable

World Leading Full System Efficacy – 3.15+ μmole/J – at Full Output Power! Confirmed By Independent Lab Tests – Review Lab Results

SKU: GC-U-KIT-330 Category:

Growcraft ULTRA – Yield Max | Flowering Spectrum


Passive Cooling Linear Bar Design

Thin Profile – Only 1.375in Tall

3,888 5k Samsung Top-bin White LEDs | 216 660nm Top-bin Red LEDs | 4,104 Diodes Total!

Maximum efficacy

Remote Power Driver Location

Lower your heat load by removing power driver outside grow area

Made in the USA – Finest quality materials and workmanship

Input Power Draw: 330W
Input Voltage Range: 90-305 VAC

120 VAC Current Draw: 2.8 Amps
208 VAC Current Draw: 1.6 Amps
240 VAC Current Draw: 1.4 Amps
277 VAC Current Draw: 1.2 Amps

Power Driver: Mean Well HLG-320H-48B
AC Power Cord Length: 6.5 ft
DC Extension Cord Length: 7 ft
Dimming Range: 10-100%

Power Driver Efficiency: 95% @ 230 VAC
Full System Efficacy: 3.15 μmole/J – See Lab Test Report

Light System LED Information:
3,888 pcs – Samsung 5000K White LEDs
216 pcs – Deep Red 660nm LEDs
4,104 pcs – Total LEDs Per 330W Light System!

Warranty: 3-Year DIY Kits Warranty Included

Operating Temperature Range: 41°F – 95°F | 5°C – 35°C
Operating Humidity Range: 10 – 90% Non-Condensing
Generated Heat Load: 1,126 BTU/Hour

Water Protection: Currently the Growcraft has no protective coating against direct moisture exposure. If moisture accumulates near the LEDs damage may occur. Make sure to point any sprays downward and away from the LEDs.

Use of VOC (Volatile Organic Compounds): DO NOT USE VOCs, like burning sulfur, near any Growcraft. This can damage the LEDs beyond repair and is NOT covered by our warranty.

Minimum Head Space Above Fixture: 6 in
Recommended Hanging Height:
12-24 in
Recommended Grow Room Ambient Air Temperature: 85°F | 29.5°C
Coverage Area: 2 x 4 ft
Start Slow – Growcraft lights have VERY high light output and unless your plants are already acclimated to high light intensity, it is best to start slow with the light hanging high and possibly also dimmed. Then monitor plant reaction over a few days and slowly adjust as needed.

Fixture Dimensions: 42.5 in x 19.5 in x 1.375 in
Fixture Weight: 17 Lbs

PAR Intensity Maps

6 in Hanging Height

12 in Hanging Height

18 in Hanging Height

24 in Hanging Height

36 in Hanging Height

DIY Kit Includes:

2 x Growcraft DIY U-Frame – 2×4
2 x Growcraft DIY U-Frame Cover – 2×4
1 x Growcraft Power Distribution PCB – 2×4
3 x Growcraft 40in Heatsink
3 x Growcraft 40in LED Board
1 x M3 – 6mm Plastite PCB Screw – 5 pack
1 x M3 – 8mm Plastite PCB Screw – 25 pack
1 x M3 – 5mm Countersunk Torx Screw – 25 pack
1 x M4 – 14mm Torx Screw – 25 pack
3 x Growcraft PCB End Cover 2 Pack – ChilLED WHITE
1 x Growcraft Strain Relief Cable Gland – Black
1 x 20 AWG Red & Black Solid Core Wire Pair – 6ft
1 x 48Vdc Pigtail with 2 Pin Female Connector
1 x Push Lock 7ft Driver Extension Cable
1 x Push Lock AC Power Cord (Your Choice of AC Plug)
1 x Push-Lock Mean Well HLG-320H-48B LED Driver
1 x Push-Lock Dimmer Pot
1 x Growcraft DIY U-Frame Hole Plug
4 x Rope Ratchets

Complete Step By Step DIY Kit Assembly Instructions

Weight & Dimensions

Weight 28.5 lbs
Dimensions 43.45 × 8.95 × 7.7 in
Push Lock AC Power Cord

USA 120VAC – NEMA 5-15P (Standard), USA 240VAC – NEMA 6-15P, European – EU1-16P, Australia & New Zealand – AS NZ 3112

3 reviews for Growcraft ULTRA – 330 Watt DIY LED Grow Light Kit

  1. 5 out of 5
    3 customer reviews

    jimuk (verified owner)

    My electrical knowledge is limited to changing a fuse in a plug. However the DIY assembling this LED light is super easy.
    My eyes nearly exploded when i first switched her on.
    It’s in a league of it’s own, Excellent build quality, very happy.

    • Gabrielle

      Thank you for sharing your experience, appreciate you taking the time to do that! Happy to hear that the DIY setup was a breeze for you. We strive our best to make it an easy-going process for our DIYers!

  2. 5 out of 5
    3 customer reviews


    Using an X1 Ultra to run a 4×2 with plenty of power. Super bright light and the plants are loving the spectrum

    • Gabrielle

      Thank you Chris for the review! Happy Growing.

  3. 5 out of 5
    3 customer reviews

    paul blanchard (verified owner)

    I am at 50% power in a 4×4 tent .My plants are in veg.and are blowing up.I have several Growcraft units they are all great but the ultra is a beast,I can tell the light penetration is going to be key for those lower branches.I am certain it will flower most of the 4×4 but i plan on only having a 3×4 canopy for better results.

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