All towers with 'Abilities' have their cooldowns reduced by 20% and adds a powerful energy beam attack.
High Energy Beacon artwork
High Energy Beacon was released on Mar 22, 2012, being the current final upgrade for the path 1 upgrades for Monkey Village, replacing Energy Beacon. It costs $10,200 on Easy, $12,000 on Medium, $12,960 on Hard and $14400 on Impoppable. All towers within its range with Special Abillities have their cooldowns reduced by 20% (50% on BTD5 iOS) and the village itself gets a powerful energy beam attack. This beam doesn't stop and the locked Bloon loses all its layers very quickly. This upgrade also increases the range of the Monkey Village.
Whenever this tower loses its target for a bloon, it will zap the left side of the screen.
One of these can destroy a M.O.A.B. without help on The Rink. Three can destroy a B.F.B., and eight can destroy a Z.O.M.G.
The laser generator appears to be inside a robotic eye that will even look around and blink.
Possibly a reference to the Eye of Sauron, which is a giant eye on top of high tower in the middle of a large fortress from The Lord of the Rings trilogy.
Homage to HAL 9000 from the Space Odyssey.
In the Mobile version, the eye appears to be hyper-realistic and the beam is also purple.
Also, the upgrade name was shortened to Energy Beacon due to the size of the upgrade button.
The High Energy Beacon pops 6 layers per frame.
Combined with Bigger Beacons and Radar Scanner, High Energy Beacon can earn lots of money due to the combination of its enormous coverage and the Monkey Town upgrade.
After extensive testing, it has been shown that the high energy beacon reduces tower ability cooldowns by 50% on bloons TD5 iOS, despite what the description says (as of 1/19/14).
Because of this, a fully upgraded Hotter Cooldown (20% on mobile instead of 30%) allows a total cooldown of 70%. (85% counting the Bloontonium Reactor)
The beam can't pop Camo Bloons without the Radar Scanner upgrade, and even if bought, it won't allow other High Energy Beacons to target camo bloons.
High Energy Beacon is also not affected by Meerkat Spy.
In mobile, when upgrade to this, the towers cooldown will become the duration remaining of the cooldown and make the cooldown faster.
High Energy Beacon in action! High Energy Beacon artwork. High Energy Beacon upgrade pic. High Energy Beacon in Protect Monkey Town mission. High Energy Beacon takes on MOABs
Upgrades in the Bloons TD series Current Towers Former Towers