Hey hey, why to be so complicated?
Triacs are mostly recommended if you want to trigger the load in high speed, like shaping the 60Hz wave form(dimmer do this) or switching something quickly.
If you just want to switch a load with slow rate (less than 1 time per second), use a relay.
Just choose one that will support the load currect. If your load is a regular 100W 120VAC lamp, the current will be only 0.8A and most micro relays support it.
if your triggering ciscuit doesn't have enough currect to direct connect to the relay coil, use some current driver as attached.
Nilo