PopBloom has many lights versions. The following FYR
1, shannon is remoter version(only few sunrise/sunset/moon function),
Turing is smart version with a controller(free to do your own lighting cycle). Each controller can driver at least 5 pcs light panels.
2, for a tank less than 24" deep, no fan version is best choice. for more than 24" fan version is best choice.
The following link is newest version for each type.
Shannon for less 24" deep
https://www.aliexpress.com/item/1005001489253065.html
turning for less 24" deep
https://www.aliexpress.com/item/1005001572743806.html
turing for more 24" deep
https://www.aliexpress.com/item/1005001511782247.html
There are 2 type of controller way:
1, shannon: it is a remoter. To eays use, the function are limited on "one press" . So,
*there are sunrise/sunset, but slop rate can not be setting. the change is 2%/1s and
*each channon can be set seperately, can not rise/down as it own slop rate.
*the timer is base on relative-run-time. I mean "on 10 hours then off 14 hours" !
*the moon can not be set. there are on/off during the night hours.
*three preset modes: Noon, echo( focus on grow and save energy), Moon.
*have to set light one by one !
2, Turing: there are display, so it is easy to setting current real time. so it can be program.
*each channel can be set indepentendly. max brightness, sunrise/sunset slot rate, more sunrise/sunset cycle in one 24 hours day!
* the moon can be set flexiable . the brightness, lunar cycle, on/off time.
* there are many preset modes: coral fast grow, slow accalamation, after frag-cut, 4-season simulation......
* all lights are connected together and can be program together. !
the shannon is the best choice to replace the old lights only with "on/off switch and dim Knob".
Also you have to hang the controller on the tank well, so for small tank, Shannon16/Shannon16F is best choice.
when the tank is more than 36", the turing is best choice. all lights are can be program, it is really very cool.