Do you have the internal dimmer or external? I find the A drivers with the internal POT to be a total pain in the ass, and the slotted stem is plastic, and very easy to damage. I'd only use them on lights I had no plans to dim.... or to adjust no more than a couple times. But that is the driver most often supplied with kits.
My HLG no longer dimms, its worn out. I kinda feel sorry for my baby autos, they gettin pelted 24/7
Weather forecast is warmer next week, I hope to be able to shut down 3-4 hours a day. I keep the light a good 35 to 39 inches away but all this brightness doesn't seem to help the vegging. That period is almost over, Im seeing tiny prebudlets......oldest plants are 25 days old, two of them are 22.
The Timber 2 VL is not enough wattage by itself.....and the CMH seems to go through bulbs like crazy, I'd rather not use that. Next grow I'm gonna have to buy a few Phillips cmh bulbs again. Beats droppin another $700-900 on a light.