Usually, there is a design margin of LED driver dimming circuit. Take Upowertek LED driver, for example, the max. allowed voltage listed in the datasheet is 20Vdc. It will break at around 50Vdc input. Please note that this is only applied on Upowertek LED drivers, different brand LED drivers have different designs.

It will always be on the packaging of the LED. But if it is not, try to find it on its leaflet, or contact the manufacturer.

Technically, yes, it will increase the life of LEDs. But the reason behind this is the temperature. Because less electricity will keep the electricity cool and it will extend its life. But with time, the output of the LED will reduce

no, you can’t.

Yes, you can, but the results will be terrible. It will not be smooth, and it will produce blazing and jerky lights. As a result, the light lamp will fail soon.

Dimming means controlling the flow of light in light fittings and lamps. So you can control the light intensity.

Yes, you do. But first, you need to determine whether the LED you are using has a dimming option or not.

yes, because these drivers can control the flow of electricity running through LEDs.

Standard LED lights only provide illumination but LED grow lights are for vegetation and flowering. For this reason, LED grow lights have a more special spectrum of red, green, and blue for better photosynthesis. And the installation density or a system power density is much higher than conventional LED lights.