Probably shitty LED bulbs with poor drive circuitry. Eye strain is usually caused by flicker, which often comes from bulbs that use PWM (cheap dimmable bulbs) o

Probably shitty LED bulbs with poor drive circuitry. Eye strain is usually caused by flicker, which often comes from bulbs that use PWM (cheap dimmable bulbs) or don’t have large enough capacitors (or any at all and just rely on a diode and resistor to manage voltage, so you end up suffering from 50/60hz flicker, frequently half wave rectified making it even worse).