You can buy both of these boards for under $20 from Amazon and here's a schematic if you want to change anyway you get your mod. The way I did it was I used the low-level trigger and ran one wire to any rollover switch I chose I chose the C letter. Put it in the middle lug you can program the board to run for however long you want giving it has a trigger I have grogu running for 4 seconds on my pro whenever C is rolled over. I have him dialed to about 5.5-6 volts using a regulator. You can find a 12 volt source from the ticket dispenser plug on the cabinet node. I did it this way so he's not constantly running using a light sensor. If you are letting him run using a light sensor he is not going to last long at all, especially if you don't regulate him down.

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Refer to my post here #171 under 20 bucks with Amazon and you can trigger it on any rollover(I chose C-lane) for any amount of time you want.