Actually, all security cameras tends to have an IR filter by default, otherwise colors will be off. Better surveillance cameras will have a "movable cut filter

Actually, all security cameras tends to have an IR filter by default, otherwise colors will be off. Better surveillance cameras will have a "movable cut filter", meaning a mechanism to remove the IR filter from the light path to the sensor to allow for better low-light images. In this mode, the camera reverts to black and white images so you don't get the color shift from the ambient IR light. Using some average 5mm IR LEDs in a flashlight setup during daylight hours would do nothing most of the time. At night you might be able to cause problems with some cheaper cameras, better units with good Wide Dynamic Range specifications would be able to handle most of these kinds of disruptor devices. You'd need some really powerful IR LEDs, like an array of OSRAM IR LEDs (https://ams-osram.com/products/leds/ir-leds https://ams-osram.com/products/leds/ir-leds) to create a strong IR floodlight that would cause the camera to be blown out. Also it is common these days for cameras to send alerts on problems with massive image disruption, so you'd have to hope you're trying to disrupt a very cheap system with nobody receiving event notifications (which is admittedly still very common).