incandescent

Hello all! I love this community, learning so much about betta care! As the title suggests, from what i have read, fluorescent is the way to go. The 15 watt incandescent that came with my tank (Aqueon Mini Bow 2-1/2 Desktop Aquarium Kit) which causes temperature fluctuations...

I have a 5 gal for my betta, and it came with a 15watt incandescent bulb, but I would like to upgrade to a compact fluorescent. The tank hood says no more than 25 watts. Today, I got a 10watt compact fluorescent, and it fit perfectly; however, when I turned it on, it lit up and then immediately...