Jack –
" only on weekends so not long exposure to an arc light."
You reckon? Even quite brief flashes can give you arc-eye, depending not very much on their intensity and power! As Russ says, "… hot sand in your eye at 3am".
Don't take chances.
It's not only your eyes that you can harm although they are the most fragile and most important to protect.
The UV radiation from welding can "sun-burn" unprotected skin, even if safe from spatter.
I don't weld often – I am not right good at it, with my wobbly hands and little practice. Even so I still wear a buttoned-up boiler-suit and leather gloves. Also an auto-darkening helmet, replacing a full-face but nod-down type. Never those little Greek Drama things supplied with the DIY trade welders.
'
Regarding the auto-darkening ones, this may not apply to all those now sold but…
Mine has an instruction to keep it (like all good employees?) in the dark when not used, to maximise the sensor's life I believe. And when using it, to keep the sensor covered during off-head rests. I stand mine on a safe surface lens down for rests; but store it in its original, intact sales carton.