Here's what I would do if you have excellent blooms. Get a glass jar (used for making jam) and a pack of sugar (brown or white) that would more or less fill up the glass jar.
First, put about an inch of sugar in the jar, then go around and collect the lemon flowers, leaving only two to three per cluster. As the flowers fill up a single layer, place another inch of sugar on top, and then fill with flowers that you collect from thinning out. Pretty soon, you would have filled up your jar. Set aside in warm dry place inside the house, like on top of the fridge. After a while, the sugar will melt, and it would make excellent syrup for tea, pancakes and other things you'd like to do with syrup. It is very aromatic.
Nothing goes to waste! And you would have thinned out your lemon flowers nicely.
Also take note that be selective of the flowers. Some of them are predominantly staminate, which means they will be predominantly male flowers and you remove those. Leave behind the flowers that are more towards the pistillate form, these are the ones that have better chances of turning into fruits.