I really can't ID the light but since it was for a salt setup I assume its expensive. Looks like a 4 bulb t5 HO light. Those at 72" go for 400+ new. And 400 is for the cheaper brand. If you could you should take pictures of the bulbs so we can get a better view. But I assume its a light that could sustain corals so its worth a lot. As for lids just go to homedepot / lowes and have them cut it for you