it's fine for starting out... get your use out of it and learn on a few plants that won't be perfect, yet...but, will provide awesome enough results, don't get me wrong.
It's not an efficient light. They don't even advertise their efficacy. I'd say those PAR ratings are suspect too. I'd only grow one plant or multiple smaller plants under this light. 1x2 fotprint.. maybe 1.5'x2'. Beyond that it'll not provide enough light. Reflective walls will help around the edges, of course.
2 is fine.. just keep size to footprint. Don't overcrowd. Airflow between colas is key to their development. When they are about 1/2 the area of the light footprint, change to bloom schedule.
I used similar lights for a year. they work fine, but produce a lot of heat for LED and cost more in electricity while you use it. So the cost savings initially is quickly lost over time in comparison to more expensive lights. Learn with this light, and save up for some better equipment next upgrade.
a high end LED efficacy would be 2.7 - 3.0 umol/s*J^-1. the more light:heat you get, the more you get out of the watts expended in a directly proportional way. Think better HPS are 2.2? as a baseline.
get something up near 2.7umol/s and 60k hours before it reaches 80% intensity... that's the other thing about that product.. they just say "50k hours" which could mean anything.. could mean 50% intensity. if they don't say anything specifically, assume something sketchy is going on in the description.
those par numbers are a straight up light... expect 400-500 directly under that light at a distance you can use it without heat or light damage, best guess, and precipitously lower each foot you go out from center.
Like i said, the main thing is the cost per month in electricty... this light is fine - please don't have crazy buyer's remorse because of this... it's better not to buy anything extravagent the first couple runs, in my humble opinion. Get the easy mistakes out of the way, then you know what size area(s) you want and how you want to do it... better match the equipment to your specific context later on.