I would by careful before any fast conclusion, your eyes a more sensitive to green and yellow wave length, your iris will contract and received a smaller amount of UVA UBA and violet and it's neighbor blue light vs the full illumination of the sun outside, a quick search tell me that our eyes seems to be able to accommodate by a factor of 16x.
So if your accommodation ratio in the LCD headset is let say 4x vs outside you will receiving 12% of BL sun illumination equivalent for maybe a longer period in VR. Outside ophthalmologist recommend good sun shades
Just saying, I would not take anything for granted at this point. If I take some distance from my VR enthusiasm self I don't think it's a great healthy idea to strap 2 light bulbs at 3 inch of my eyes.