When set to run for 12 hours, the light shuts off and does not come on the next day. This defeats the purpose of the timer feature.

The footprint is huge and is around 10k-18k lux at around 18 inches. And the light uses half the electricity of the hid lamp. Get these and scrap your old-school heat generators/hid lights.

Best bang for your buck period. Plants love them. This light is so awesome!

Comes with a dimmer knob 25%/50%/75%/100% and we leave it on 25% even with a large number of leafy plants beneath. Tender seedling dimmer so that it does not harm tender seedlings.

No timer. No instructions. Has a dimmer. You say in your pictures that is consumes 400watts. When the lights are off it still produces a tiny bit of light that is not good for flowering evry thing else is perfect.