Eye protection is definitely advised. The effect of working under these types of grow lights is cumulative. You need to protect your eyes! I do inspections for insurance companies for growers, processors, etc. I noticed myself getting headaches and after image burn in my eye after leaving the rooms. What I mean by after image burn, is basically having the effect like you get when you have the displeasure of having your picture taken with a flashbulb. You know, that green blob that lingers in your vision after? Well, working under these lights for any amount of time will burn your retinas. It is permanent damage! You don't even have to look directly into the lights! Your skin will get burned also, so it is recommended to wear protective clothing- cover your arms and legs, wear a hat. For those of you who have bigger operations and employees, this can end up being a Workman's Compensation issue! Require everyone that goes in grow rooms- especially with the ones using High Pressure Sodium lights, to wear eye protection! I did some research on this and have ended up with a pair of Method 7s (M7s). Took a photo through them. Not only will they protect your vision, but they will also help you identify issues with your plants that you may not see due to the light color the bulbs emit.