[CQ-Contest] Load testing a 50 amp supply?

[Rich Dailey, N8UX (2)]

>I just repaired (I think) a 50 amp astron rack supply.  I intend on using
>it to power two hf rigs (SO2R) and accessories.  However, I wish to load it up
>to about 30 amps to check ripple and regulation without sacrificing my
>station if something is wrong.
>Any ideas on what I could use to load it up for a test?

Thanks for all the responses.  The popular solution is to use a car headlight
(or two).  I got a couple of those.

Rich