Sister Bear
If one is a guest at someone’s house (and staying there overnight), one should give the owner a small amount of money to buy a portion in their candles and one may fulfil the obligation through the owner. Alternatively the guest may light his own Menorah.
In exceptional circumstances one may light one and a quarter hours before sunset with a blessing. (However one should be careful to put in more oil or to use longer candles). If possible it is better to appoint an agent to light candles at the correct time, than to light early.
If one forgot or was not able to light at the correct time, one may light as long as people are still awake in the house in which one is lighting. (Your house)