Question about Firework viewing at Rose and Crown?

We just scored a Candlelight Rose and Crown 7:50 dinner with 5:00 processional show! Just wondering if the 5:00 show is as good as 645 or 815(lighting) and with our dinner reservation at Rose and Crown at 7:50 pm will we be able to at least stand on patio for firework viewing at 930? TIA!