What size LED light for 4x8 grow tent?

August 14, 2020

Determining your LED light size is basically a two-steps process. First, you need to calculate the size of grow space and second, find out the canopy dimension.

People often ask us, how many Watts need for a 4 x 8 grow tent. Well, keep your eyes hooked below for the answer!

During the FLOWERING STAGE

To produce a favorable yield in flowering period, you need a LED light with an output of at least 50W per square foot of growing space. Now your 4×8 grow tent is 4ft long and 8ft wide. Which gives you a square foot grow space of (4ft x 8ft) = 32. And then, multiply this figure by 50W: (32 x 50)W = 1600 W.

This means your 4 x 8 grow tent requires an LED cannabis grow light bulb size which is at least 1600W or, you can use a combination of multiple LED grow bulbs which will be totaling to 1600W.

During the VEGETATION STAGE

In the vegetation period, you need only half of the power compared to the previous flowering stage. In simple words, if you needed 1600W in the flowering stage, then in the vegetation stage you will require: (1600 ÷ 2)W = 800W.

This implies in future vegetation period, your 4 x 8 grow tent will require an LED grow light bulb size of at least 800W, or you may combine multiple LED lights which will total to 800W.

So, Which LED Grow Light Should You Pick?

If you’re still unsure which LED grow light to go for, then I’ve written a detailed guide to the best LED grow lights that you might find helpful.

ECO Farm 900W Commercial Full Spectrum LED Grow Light Bar MS Series

ECO Farm 660W/900W Commercial Full Spectrum LED Grow Light Bar MS Series-growpackage.com

Features:
Full spectrum with enhanced red for full cycle grows.
Efficacy is up to 2.7μmol/J.
No wiring needed, it takes less than 50 seconds to install a fixture
Using Sosen driver and Samsung LM301B & Osram LED chips

Spectrum

Watt :900W-8bars
Actual power:900W±10%
LED Chips:2816 LM301b 3030 white chips
+ 64 Osram 660nm Red chips
Weight:30.8lbs/14kg
PPF :2430 μmol/s
Footprint:6x6 ft
Efficacy:2.7μmol/J
AC Input Voltage:120-277V AC,347-480V AC,50/60Hz
Mounting Height >=6''(15.2cm) Above canopy
Thermal Management:Passive
Max. Ambient Temperature:95°F/35°C
Dimming:0-10V Dimmable
Total Harmonic Distortion(THD):<15%
Warranty:5 Years Standard Warranty

Yearld Pro 660W LED Grow Light Bar

Spectrum

Watts: 660W (±5％)

PPF(μmol/s): 1716 µmol/s

Efficacy: 2.6 µmol/J @ 277 AC

Spectrum: 3920k white+660nm red

Color Rendering Index: 90

LED: Samsung LM301B & Osram

LED Count: Samsung*2816 & Osram*64

LED Lifespan: ≥50,000 hours

Driver: Meanwell ELG-240-48AB * 4

Driver Lifespan: ≥50,000 hours

Input Volts: Autosensing 120-277V

Dimmable: (0, 40%, 60%, 80%, 100%)

Master Controller: Yes (sold separately)

Daisy Chain: Available on request

Coverage Area: Veg: 6x6 ft, Flower: 5x5 ft

Mounting Height: 6'' - 18'' above canopy

IP Rating: IP65

Foldable: Yes

Dimensions: 46.46'' x 44.88'' x 2.76''

Weight: 24.4lbs(12KG)

Warranty: 5-year standard

PhotonTek X 600W Pro LED

PhotonTek X 600W Pro LED - LED Grow Lights Depot

Spectrum

Power Consumption: 600W

Efficacy: 2.7 µmol/J

PPF: 1620 µmol/s

Light Source: Osram & Lumileds Philips Diodes

Spectrum: Full Spectrum

Input Voltage: 120-270V

Coverage Area: 4’ x 4’ – 5’ x 5’

Waterproof: IP65

Lifetime: 60 000 Hrs

Light Distribution: 120°

Dimmable: OFF-25%-50%-75%-100% with 0-10V Light Dimmer (Included)

External Control: With PHOTONTEK Digital Controller

Weight: 29.76 Lbs

Dimensions: 42.95’’ x 46.55’’ x 2.04’’

ECO Farm ECOZ 700W Samsung 301H Chips LED Grow Light With Separately UV+IR Control

'Clip in & out' Design - Extremely easy to transport and install with lowest maintenance cost.
Full Spectrum white enhanced with Red, IR & UV.
Three Independent Adjustable Spectrum Channel makes everyting under your control.
RJ11 connection for massive control opperation.
Industry thickest heatsink guarantee you less heat resulting in longer lifespan.
Balanced Light Distribution - Uniform level of PPFD coverage for better canopy penetration..

Parfactworks-700W-led-grow-bar-par-reading