I run a tw700 wifout a ups..

I only had one instance wher ther was a pwr failure while I was usin.. no issue then..

FWIW.. my pj only has d fan on for less than a min aftr u pwr dwn.. at least it feels like less than a min ..

I dont hv space for d ups anyway on de pj shlf n if not mistaken .. wat kills bulbs is not pwring dwn but restrikin a hot lamp = meanin u on d pj b4 d bulb has totally cooled dwn [ it can take a coupla hrs for it to cool dwn]

my 2 cts
D