It's easy, the cheapest red LED deco light f.e. for clamp lamps will do the job with every kind of bw paper. Anything else than red must be tested seperately with every kind of paper you use, no matter how cheap or expensive you lamp was. Red is always safe, but orange that I mostly use is more conveniant. Yellow is mostly unsafe. There is absolutely no need to buy expensive safe lights for bw nowadays. The old safe lights with light bulbs and filters are a deal worse.
Best - Reinhold