couple things. First , I don't think the incandescent issue brought up by PWD72s should be an issue- this fixture uses 50w halogen spots , correct ?
Only drawback is that they are just that - 'spots'. They may create four circles of brightness on your table. If this is the case , you may be able to aleviate it somewhat by switching to 35w diffuser spots - just ask the associate in lighting , he can assist you with bulb interchange.
If 3kushn is correct and you have an issue with glare to the side , you have 3 options . The first is to replace the glasses - there are several options available for purchase for this type of fixture . The second is 'faux' painting - if someone in your family is artistic , the can paint them to look like marble , stone , or metal and reduce the emitted light through the side. The third and least elegant solution is to wrap 'em in bumper stickers- which may smoke near the heat of those halogens , and start a fire over your felt (management does not recommend option 3 at any time )
In the end , the only way to know if a light not designed for a pool table will make you happy over your pool table is to take it home and hang it . Save the box & receipt . . .