I just foned them. The difference should only be an extra $20.
$99 for a standard 2 tank dive. $119 for the lost blue hole.
In answer to your question, no it's not worth an extra $111. I'd say it is worth the extra $20.
Try to go in the AM. The live aboards get there earlier than BDs and kick up silt. with no current in the hole, it just sits there. Look for the cave system that starts about 85'.
If i'm correct, Light house reef is to the western end of Paradise island, at the mouth of the port. I'm told it's made up of interlocking stacked concrete "crosses" for errosion defence. Whilst shallow, it's supposed to be FULL of fish! Even if you don't spend the extra, i don't reckon you'll lose out!
Get'em to check their prices. 1-242-393-6054. Sam or Collie are the people to speak to if you don't get any sence out of the lady that'll answer.
Happy Trails!
Dan.