We way over ordered on these a few years back! Selling them by the case. These were originally around $16 for 2 bulbs. 4000k rating. I know first hand that these bulbs last forever. We have hundreds of them in use in our facility. I haven’t had to change a single one out in years. These are “plug and play” bulbs. They run off the ballast in your current 4’ fixtures. No need to hardwire them. Asking $110/case of 24 bulbs (about $4.59/bulb). We have 16 cases available. Text Jared at (801) 673-3908. Thanks