Is this a big enough heater for one flowering plant in a small closet?

http://www.amazon.com/Lasko-106-Personal-Ceramic-Heater/dp/B0058V9SB8/ref=cm_cr_pr_product_top

I'm growing in a 2x6x8 ft (approx.) closet and I have up until now only been keeping track of the temperature during the day. I got a thermometer that tracks the lows and highs and realized my closet reaches down to 55 degrees fahrenheit at night! I am only using a small portion of the closet to grow one plant so the space I need to keep warm is actually 2x3x4.

Yes, i use a $16 heater i got from Home Depot. I had to put the heater close to my fan so the heat spread evenly, it gave one of my babies some heat stress.

I bet that would work fine.

What's your light-on temperature?

My light on temperature is 79-81