I dont understand that. Do you mean like PWM? That is still on/off. The person who gave me that diagram also made me some boxes. Each one accepts serial input and uses PWM to fade the outputs. Im already using these for some of the lights but when he made them he warned me not to connect any transformers or even UV lights. Im wondering if connecting a strobe would damage them. If not then i dont have to have to strobe on my circuit at all.

What is the worst that could happen? The internal chip is protected by optoisolators and each output is fused. I accidentally blew a triac once (under normal use) and it was hard to replace. All 8 triacs are rivveted to the side.

What do you mean by ground plane? Is that just a lot of grounded copper on the PCB? This circuit is running from a breadboard. I will make something more profesional next year when i have time and equipment.