halcyon swapout/upgrades

[scubajohn921]

so i just picked this halcyon canister up relatively cheap, havent got it yet, seller says its a "14W" (?) bulb, i think he means a 10W bulb also comes with a "power sonic" battery and charger, my question is can i drop a new halcyon battery in there with a new more powerful light head (yeah i know the price of the halcyon batteries and bulbs) should i want to? pricey, yes, worth it? we'll see when it comes , im struggling to see what model it is, any ideas? looks possibly like an older proteus/explorer?
http://i10.ebayimg.com/03/i/000/8c/03/21cb_1.JPG