These igniters surprised me. For years I have made my own igniters out of shooter wire, nichrome wire, and my home made pyrogen formula. These often have a high resistance and some launch systems have trouble firing them due to lack of sufficient current.

I used these to light my own experimental motors (38/120 and 29/120) and they worked great! The motors did not light quickly, but they lit. They are a little on the expensive side at the retail price, but the sale prices here on Hobbylinc make these a great purchase.