If I put two 50 watt light bulbs in my 400ex will it drain the battery to much ? If so will a better type of battery help battery drain ? And where can I find light bulbs that will fit my 400ex ?

 

you can get light bulbs from dennis kirk. not sure the answer the other question

 

The generator only puts out so much power.Your lights only run off the battery if the engine isnt running, so the lights wont drain your battery, unless they draw more current than your generator can put out. The generator also recharges the battery.