Infra-red torches are quite commonly sold as accessories
for low-light viewing. Quite easy to make for yourself, or you can
buy a kit from an electronic store. Make a bank of 16, 25, however
many you want, IR LEDs, perhaps drive it with pulses for better
range. Jaycar, for example, have one in their catalogue

www.jaycar.com.au

Click on Our Catalogue,  Video Surveillance, Product Code
AA0290 for the IR torch or QC3468 to see a small b/w cammera
with IR illumination

Try a Google search for +"IR illuminator" +circuit - plenty of
hits for suppliers/kits, maybe a free circuit or two in there

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I've only had need to record at night once. It was the great
Which Neighbourhood Cat Is Peeing On The Stove In The
Middle Of The Night Mystery. Solved with a webcam, a couple
of IR LEDs and an 8-hour tape

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