LUMii Green LED Work Light Environment Sunrise and sunset can also

Sunrise and sunset can also be simulated

Lumatek 630W Double-Ended (DE) Ceramic Metal Halide (also known as CMH/CDM/LEC) lamps are available in 4200K Daylight and 3100K Agro CCT formats

You set 18/6 or 12/12 then set the seconds and this is how the timer will deliver

And when it comes to managing the pH of your nutrient solution

LUMii Green LED Work Light Environment Sunrise and sunset can alsoThe LUMii Green LED Work Light offers one 10w ULTRA BRIGHT high intensity green LED that delivers a wide beam of light for maximum viewing range. They are perfect for checking plants without interruption of the photo period. Rechargeable and compact design. Supplied with a heavy duty clip for easy fixing that can also tilt, to deliver illumination where needed. Input Voltage 12VDC 18650 lithium 7. 4v 2. 2ah battery fitted Power 10w Charge Time 4 hours