What’s the best 600 watt LED Grow Light on the market?The best 600 watt LED grow light will meet the essential requirements you need to get good yields from your cannabis plants. That’s sufficient intensity, good spectrum, and good coverage area.I’ve researched and listed the best 600 watt grow lights and listed them for you below. First, make sure to figure out what type of 600 watt grow light you want:You may be wondering why 600 watt grow lights can vary so much in cost if they’re all 600 watts? The truth is the 600 watt number can refer to one of two things, which results in a two totally different grow light strengths. On most LED grow lights the 600 watt refers to the total wattage of LED chips used in the light. That’s not the total amount of power the light actually uses.We are comparing the Luxx 645 LED lights and ECO Farm Z6-600 Samsung LM301B LED Grow Light.
Luxx 645 LED lights
The new LUXX LED was built on the principle of design, test & repeat. The LUXX 645 LED PRO has been developed by assessing SMD (Surface Mount Device) chips and drivers from leading manufacturers in controlled test applications and cultivation facilities for +3 years.The LUXX 645 LED PRO is made up of horticulture whites and Osram reds. The respective companies lead the field in LED R&D, delivering high efficiency, reliability & diode performance. The LUXX 645 LED PRO deploys a lens angle of 120 degrees, from a 6 bar design, with a total of 2,226 diodes.10ft 240v cord NEMA 6-15P with a 240-110v plug adapter (277v NEMA L7-15P SOLD SEPERATELY)6 barsIP66 WaterproofMounts to UnistrutUL/ ETL ListedManual & Auto DimmingAll in one designPlug & Play5-year warranty
ECO Farm Z6-600 Samsung LM301B LED Grow Light
Removable and Replacable Lightbars ,dimmer Control on every driver ;
IR is independently controlled,UV is independently controlled;
Samsung LM301B Full Spectrum White Light Diodes, 660nm Red Diodes, IR+UV Diodes on independent controls.Each LightBar is Made up of 272 pcs leds: Totaling 1,632 diodes ;
4x4 - 5x5 flowering footprint；
Maximize Every Inch of your Garden with The Best Distribution of Light on the Market with Over 1000 PPFD Corner to Corner;
ECO FarmPassive Cooling design easily allows air flow between lights, Extended Driver cables allow for Remote Mounting of the driver away from you plants, Making heat management an actual breeze;
The Specs
Spectrum Differences
Luxx 645 Pro LED Spectrum
ECO Farm Z6-600 Ultra 
PAR Grid Chart Differences
Luxx 645 Pro LED Grow Light 12” above a 4’ x 4’ footprint coverage area
ECO Farm Z6-600 Ultra LED Grow Light 
Comparing Expected YieldsBoth the Luxx LED and ECO Farm LED the put out some seriously impressive efficiency and total output numbers—so much that growers often claim they are getting 3 lbs (1,362 grams) per fixture when all environmental conditions are well managed. That’s an astounding 2.1 grams per watt.Grams per watt is one of the most direct ways of calculating how well a grow light produces healthy yields and harvests. For context, if you got 1 gram per watt with your 1,000w HPS fixture 3 years ago, you’d have been lauded as a grower that seriously knows how to optimize plant growth. Now we’re getting over 2 grams per watt! Both of these lights will bring about some serious yield increases when swapping out old HPS, MH, CMH, and even older LED lighting technology.