It's filament. And the cory is a peppered cory.
For £9 you can get an Ikea desk lamp with an 11w compact fluorescent bulb, and angle poise arm, which is perfect for small tank lighting. Filament lights should be avoided if possible as they generate too much heat, the wrong spectrum of light, and are not energy efficient. Also, just so you know, you could fit a group of pygmy cories in that tank, and they'd be happy as you could get 5 or 6 in there, but like was said earlier, cories should be in groups

Maybe I'll just visit Ikea... so i am looking for something small with a fluorescent bulb then?
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