This is the second ceramic bulb our family has purchased. The first was black and it worked amazing. When I saw that they were white I was worried there would be a difference. However, there was no difference. These lightbulbs are amazing! It gets warmer than any lightbulb we bought at the store for our snake tank! They don't dim the light like some other heat lamps, but they still heat up the aquarium much better than those cheap incandescent bulbs. My snakes love to bask in the heat! I would recommend everyone to have a thermometer so you can regulate the temperature and make sure your animals aren't getting too hot. I usually leave the bulbs on for 3 hours and then off for 3 hours. I would definitely recommend this lamp to anyone looking for a more powerful heat source for larger aquariums. If using on a small tank I would definitely buy a self timer because ours is 30 gallons. It doesn't take long to heat up with these bulbs!
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