Is it safe to use a 250W ELC bulb instead of a 200W EJL bulb in an 1989 Fujimoto 450M-C with a dichroic head? The enlarger has a large voltage stabilizer and it worked without any problems for a few months with an EJL bulb that came with it. ELC bulbs are easily available for me locally, unlike EJL bulbs. Apart from the 50W difference in wattage (and a third of the price), they have exactly the same characteristics of focus, voltage and colour balance. What might be the biggest potential risk here?