Hi Norm,
The MOC3043 is a zero crossing triac driver, meaning it will only switch when the AC at ~0V - not that great for phase angle controller. The datasheet for the CX240D5 is a little bit unclear as it says zero crossing (for resistive loads) and random fire (for inductove loads) but it doesn't say if it's two different versions or if it just works in two different ways depending on the type of load connected. Anyway, a light bulb is pretty resistive so.

The MOC3022N shown in the schematic is a random fire opto-triac and should work.

Another thing to look out for is that a triac may need a certain current to actually stay ON. So if you only pulse the gate of the triac the small 7.5W load may not provide enough current to allow the triac to stay on untill next zero-crossing. Not saying this is the case here but something to be aware of.

/Henrik.