If you are new to the wonderful world of LED grow lights, you might be in a haze trying to figure out how to choose the most practical light for your grow. LED grow lighting is very different from a metal halide or a high-pressure sodium setup in that LED fixtures vary drastically in shape, spectrum, heat load, and power. But fear not, this article will assist your LED grow light search --- saving you time, money, and assuring you the highest quality crop.
The 3 step guide will cover:
1.The nature of your grow
2.The size of your growing space
3.The types of LED grow lights available
1. What are you growing?
Before you decide on an LED grow light, you must consider your crop. All full-cycle, quality full spectrum led grow light sold on the market will grow a plant from seedling to flower. But some lights are designed for specific types of grows. LED grow lights used to grow indoor medical plants from seed to flower .
What is the size of your grow space?
The size of your grow space will dictate the size and number of an samsung led grow light units you purchase. A good rule-of-thumb for LED grow lights is 32 watts of actual wattage per square foot of growing space for flowering medical or other large flowering plants . For example, if you measured your growing space to be 16 square feet, you would want to purchase at least a 500-550 watt grow light (assuming the plants are congregated in a single area and you are flowering a plant that requires a lot of light. Vegetative growth for high-light plants need about half this wattage.).
Types of LED grow lights
By now, you might have an idea of what brand of LED grow lights would be best for your crop and how many watts are required for your grow space. Now, you will discover the different LED unit options available to you.

If you are growing plants from seedling to flower you will want to purchase a full cycle LED light. However, you may only need lights for vegging or blooming.
If you can not decide which or how to choose yet ,i canoffer two choic For your reference:
HIGH EFFICACY 660W 180° FOLDABLE SAMSUNG 301B+ OSRAM CHIPS
ECO Farm light strip operating at 660 watts with an output of 1700 µmol s-1, this fixture achieves an impressive efficacy of 2.6 µmol s-1 per watt. Eight passively cooled LED bars provide intense light coverage with no fans or moving parts—significantly reducing the number of possible fail points compared to other fixtures.
PRODUCT FEATURES:
High efficacy (2.6 μmol s-1 per watt)
High output for high intensity
ETL/DLC Certificate
Top bin LEDs
Balanced, full-spectrum light output
8-bar configuration allows for use in low rooms, on vertical racks, over benches, and even in tents
This is a very highly lauded grow light with some of the best longevity we have seen in the LED category. G8LED has had many iterations and has been producing LED grow lights for 8 years. Many bloggers and review sites describe this light as the cream of the crop, and it has been awarded some high accolades by major publications. 
These lights are for both vegetative growth and flowering and provide intense lighting for 24 square feet of canopy. The light emits low heat and requires low electricity usage. If you want to graduate from a beginner set up to a professional production, this is the perfect light for you.
You may think it is a high price tag, but the money you save through electricity costs and the durability of thishighest yielding led grow light will get you a long way.
Gavita Pro 1700e LED
DLC Listed
High efficacy (2.6 μmol s-1 per watt)
High output for high intensity
FCC and UL8800 compliant, IP66 wet rated
CE and CB compliant, IP56 wet rated in Europe
Top bin LEDs
Reduced HVAC requirement (30-40% less)
Balanced, full-spectrum light output
Dimmable up to 50% without loss in efficiency when used with the Gavita E-Series LED Adapter
8-bar configuration allows for use in low rooms, on vertical racks, over benches, and even in tents
the lights have great design and also have high PAR value across your canopy. King Plus is a relatively new player in the market, but they have come out swinging with this light. Featuring 10W Double Chips, which are brighter more efficient than traditional 3W and 5W LEDs, this lamp is scientifically engineered to keep the balance of the PAR & lumen output and coverage. It gives BESTVA a run for it's money, beating it on $ / watt, but keep in mind you typically get what you pay for and you can expect the BESTVA to last longer.
Great for grow tents, a room, and greenhouses. This is also a great product for you if you want something that’s easy to install as it comes with everything you need (hangers, cords, carabiners). 
Customers rave about how fast the plants grow and how potent they become. This light produces very high PAR at a very low wattage. Great for energy consumption and for the price, this light gets the job done.
Hope you can finde one grow light you and your plants like !