The best setup would be 2 of the lights at the bottom of the page, which would be 400 lumens per light and give you 80 minutes at full power but 2 hours of runtime.. The R5 light will give you 3+ hours of runtime but is 300 lumens per light, 2 of these together is a fine setup..

http://www.shiningbeam.com/servlet/t...4-II-R5/Detail

http://www.lighthound.com/Ultrafire-...er_p_2279.html

http://www.lighthound.com/Ultrafire-...ry_p_3141.html

http://www.lighthound.com/Twofish-Lo...nt_p_2252.html

for 20.00 more get 450 lumens, slightly reduced runtime vs the romisen R5..:

OP Reflector for a little more side spill http://www.shiningbeam.com/servlet/t...-rocket/Detail

Smooth Reflector for better throw: http://www.shiningbeam.com/servlet/t...et-Cree/Detail

If price is not an option the best and brightest single cell light is the Elektrolumens EDC-MCE Light - http://elektrolumens.com/EDC-P7/EDC-MCE.html

The Elektrolumens light is the brightest single cell light I've used.. Easily 700 lumens out the front.. Runtime is 50 minutes to 1 hour.. It is best to bring an extra cell just in case when using a direct drive light like this..