When it comes to purchasing LED grow lights, we at ALL LED LLC know you have a plethora of choices available from many different sellers, all of whom claim that their products are the best available. While LED grow lights are definitely more power-efficient than the old generation of High-Pressure Sodium and Metal Halide bulbs, and will considerably lower your electricity bill, all LED grow lamps are not standardized and do not represent equal performance. There are literally unlimited variables of wavelengths and ratios that can be employed into a light design, as well as the LEDs themselves and how they are powered.ALL LED LLC wants you to know these facts before you decide:Some manufacturers claim that their lamps are the brightest, and offer their specifications in lumens. A lumen, however, is a measure of light which is based upon human perception and not a true, accurate measure of the photosynthetic power of light at all. Indeed, while their light may appear to be bright to us, it might not be bright to plants at all; if the light does not consist of all the precision values (wavelengths) plants need to thrive. If a manufacturer advertises their light specifications in lumens, lux or candlepower, beware! In China and the rest, cell phone LED drive circuit is a charge pump structure from the series to boost the architecture. Because the latter not merely more efficient, and can drive more LBD to support more big screens. As smart phones and larger the LED display increasing popularity, drive seven or more demands: universal LED Japan. And the best way is by way of the series driver LED, make each LED to the brightness of the same; And because the charge pump is based on parallel drive LED, so no matter how small screen, parallel passages of the current is brightness) will have some differences. From seven or more LED design layout perspective, if the LED the charge pump drive, PCB (printed circuit board) territory more complex: and series booster LED drive is considerably simpler. Pay attention to the cost for cell phones, for instance, is a linear LED driver advance direction, take its circuit is simple, and easy to into the design. However, the charge pump scheme at the cost of the products field and sensitive low in the mobile phone in will still be widely used.