This penlight seems perfect for you, in the event of blackouts or just to have on hand. http://www.amazon.com/dp/B0015UC17E/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=3EFKQT8SS1K99&coliid=I3QM5ZOK2PKI1A&psc=1
Alternatively, there's Israeli tourniquet bandages for 10 each or so.
http://www.amazon.com/Ever-Ready-First-Aid-Compression/dp/B003DPVERM
And a third alternate would be some of these really nice gel pens.