Yeah - also the pic of the old bulb indicates that there is VERY low voltage on the headlight. You should check really as using a LED bulb is masking the real problem: insufficient electric connections. Very often, the cables have developed verdigris between the cable and the connector, which increases resistance and therewith lowers voltage. Check all 3 cables (also earthing, yes!) and make sure all have proper and sufficient contact and deliver the least possible resistance. that itself can give you 30 - 40% more light even on H4 bulbs. The relay solution is a good one, but it could potentially also cause problems if the root cause (high resistance) isn't cured. So - first step: check Voltage at the front bulb and potentially renew the connectors, second integrate a relay, third change the bulb to LED. Keep in mind that bad connections have high resistance and can cause a lot of heat in the cables when used...