It depends if you want to stay with incandescent, or go with LED. If you choose LED, there are many options available.
There's a 300W R40 flood, which would be a much warmer color than the photo light.
1000bulbs linkThe 150W outdoor flood (PAR38) would have a more concentrated beam, and I don't know how much area you need to light. There are also 250W incandescent PAR38, which produces about 3,000 lumens.
1000bulbs linkYou could also get a dimmer to use with the original photo lamps. If you don't run them at full intensity, they will last much longer. Also bringing the intensity up slowly will provide longer life - it reduces the stress on the filament.