Originally Posted by Chip Shorter

theremart- I think the SCR he wants you to use should be rated for 800 volts. I have some that are as big as a hockey puck and others that are in a TO-220 package size. All 800 volts.

If your talking about the resistors on the 555 and the h11d1 1/8 watt will do. I would go 1/4 or half watt on the transistor circuit. The cap I used on my first one was out of a flash circuit for a disposable camera. The value escapes me at this time but the whole thing worked great.