If you are looking to start out with indoor growing, It is important to realize that not all LED grow lights are created equally and while they share a common name, they do not necessarily function to get the job done which you require. It can be a little overwhelming when you are trying to decide which LED lights are the best. Now, read on the comparison and see if the two are what you need.

HORTICULTURE LED GROW LIGHT HIGH EFFICIENCY HLG-550 V2 QUANTUM BOARD
HLG550 V2 indoor horticulture LED Lamp is designed to replace a single ended 1000W HID light. Each lamp uses 4 of our custom designed high efficiency white light Quantum Boards made by Samsung. 500 watts with 1152 highest output Samsung LM301B LED. Comes in either 3000K (Flowering and Full Cycle) or 4000K (Veg only) spectrums.
TOP FEATURES
High-efficiency custom-designed white light quantum boards with Samsung LM301B diodes
3000K white-light full spectrum for optimal canopy penetration and easy viewing
Ideal for seedling to harvest growth 
Reliable passive-cooled design (no cooling fans required)
Optimal canopy penetration with diffused light via a large form factor
Optional lenses for narrower beam angle and increased intensity 
Dimmable high-efficiency Mean Well driver (240-480W range)
Specifications

Power: 240-500 Watts
Voltage Range:90-277 VAC
LED: 1152 pcs Samsung 301B
Flowering Footprint: 4.5'X4.5' or 5'X5'
Veg Footprint: 6'X6'
System Efficiency: 171 Lm / W
System PPF Efficacy 2.5 μmol / joule
Total output: 1178.05 PPF
Dimensions: 26"X20"x3"
Recommended Mounting Height: 22-32 inches
ECO FARM DIMMABLE QUANTUM BOARD WITH SAMSUNG LM301H+CREE 660NM+ LG 395NM+ CREE 730NM CHIPS 120W/240W/320W/480W/600W LED GROW LIGHT
TOP FEATURES
High-efficiency white light Quantum Boards
White LightFull Spectrum Led for better results
Reliable passive cooled design, 10mm thickness plate
Better canopy light penetration with diffused light
Perfect performance for veg and bloom
Dimmable
IR is independently controlled
UV is independently controlled
Back wiring is waterproof
Pre-assembled
Description

Improper use of UV IR may have a negative effect on your plant 
Proper use of UV IR containing luminaires to ensure your plants grow better and get  more trichome density  and THC content
All customers will receive our growing guide
The role of UV:
Increasing the THC content of plants ,only be used in the last two weeks of flowering stage, and if be used at other times in the plants,may have a negative effect on plants 
The role of IR:
Increasing the number of flowers , only be used in the early flowering period and stopped once buds begin to appear
This requires the IR and UV must be individually controlled