Just wanted to let you know that I have been using this 500W floodlight bulb as a cheap braking resistor for intermittent motor braking. It is easy to solder to and provides useful visual indication.

They are rated at 500W on 230V European grid voltage but have about 9 Ohms cold state resistance. Of course it would increase to 100+ Ohms when heated up to full brightness. However it works great for quick brake action preventing switched mode PSU from tripping due to a sudden overvolatge.

I would guess that if you see it glowing bright then you need to get a proper braking resistor with a heatsink.

In the US you probably need to connect two 250W in series to get the same result.