Update: Printed 4x5 and 5x7 over the weekend and coverage is fine with a 150mm enlarging lens used for both. Contrast on VC paper is a marginally harder by about 1/2 to 1 grade based on a small sample. i.e. I find grade 1 1/2 gives me the kind of contrast I was getting using grade 2 or maybe 2 1/2 with the other light source. Very happy with tonal separation and midtones and printing seemed marginally "easier" overall. Maybe it was the lack of heat penetrating my forehead and the absence of that faint burning smell!

This is a less than perfect way to illustrate results but here are rough shots of two prints from well exposed negatives at grade 1 1/12. Ilford warmtone paper in dektol with 3 mins in selenium. I will stick to this light source for now as I can't see any downsides so far.

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