That's because they are using a comparative value e.g is = to a 600W HPS or MH, or whatever. LEDS do not consume as much power so, yes we will see the watts drawn from the wall halved. It doesn't mean diddly. Just, old habits and beliefs are hard to break. That being said, LEDs do not have the penetration when compared to other light sources. e.g a 23w household LED puts out as much light as a 100w incandescent bulb but, only consumes 23Also the advertised wattage is always nowwhere near the wattages drawn...
That would be correct!Many "Made in USA" and other western countries electrical products are actually assembled China parts. Don't be fooled by the marketing.
I am speculating but what are the odds that Joe from USA builds faulty lights at the same rate as John from China?
In other words mistakes are possible anywhere. Retail markets will have a mix of things. Sometimes more expensive is better built and sometimes expensive is mark up profit.
LEDs specifically are pretty new for grow lights. Some look like they could get pretty hot. Compare a densely packed COB LED to Samsung LED strip lights with aluminum channels. Different light spread and thermal mass for cooling. these two light styles probably perform somewhat differently.
LEDs appear to work well for plant growth. Whether some of the early units are akin to flea market car stereo amplifiers I'm unsure. We might see them continue to pick up. The wavelength specificity and adjustment with LEDs sound fascinating.
This may be a silly analogy regarding LEDs but when the first car was invented people still used horses for a long time. In fact the first car may have been worse than a horse practically. When the first light bulb was invented people still used candles for a long time. So even if LEDs are a space ship it will take time to see IMO.