There are some new LED lightbulbs that are high output.... If I had your tractor with 40 amps I would put a lightbar on, ROPS High (meaning up as high as your ROPS or mounted on your ROPS), and I would replace the lightbulbs with the new high intensity LED. They will put light on and under the bucket, which a lightbar will miss.
I personally order my LED lights out of china. After a lot of research it turns out that no LEDs (the bulbs) are manufactured in the US and very few housings are manufactured in the US.
Not afan of buying chinese, but when there is no choice, not a fan of being gouged by US distributors who just change labels.
a 40 WATT (actually consuming 40 watt) LED Light bar is so so so much more bright than a conventional bulb of the same wattage consumption.
Can you put up a link for the light bar you are mentioning? The better designs have the center in SPOT mode, and the edges in FLOOD. do not buy SPOT LED housings, really a bad decision...
Oh and just do yourself a favor and plan on spending money on a second light bar pointed back. Once you get these LED lights on you are going to be amazed.