Yes, get the hps and you will improve you yeild no end.
keep ur plants small and your be fine.
peace.
I would agree. More than likely a 150W MH or HPS will significantly affect your end results. As far as the Flying Piggies go, if you're in the U.S., in 2001, it was deemed illegal search and seizure for the police to use FLIR on properties to garner warrants. A warrant is necessary before any FLIR imaging can be used on your property (legally speaking).
That said, make sure you are extremely careful with everything that you are working with if you really do live that close to where Piggies take Flight. Meaning, best odor control you can afford. Keep all of your trimmings during/after the grow (might use them in making compost if you're growing soil medium). Pay for all transactions with a prepaid debit card. Have growing supplies (if any ordered online) shipped to various locations to be picked up, instead of to your own place. Tell no one -- your best friend shouldn't even know about your grow, no matter how much you trust him. Overall, just don't leave anything to chance -- you control the variables, you control the results. Simple science, my man.