Just keep in mind that the Sparklite has a hollow middle which a spring and a "plug" have been inserted. If you cut or drill the handle you may cause the spring to push the plug out of the bottom. Look at the bottom of the Sparklite and you will see the plug.
I found this out when I drilled a small hole through a couple Sparklites to hang on a keyring. One of three that were drilled had the failure I described; the other two did not. But this made me decide to not modify any more Sparklites.