PROBLEM TO BE SOLVED: To provide an LED lamp for plant cultivation as a plant cultivation light sauce excellent in growth promoting effect, having good energy efficiency and capable of being easily set up.SOLUTION: An LED lamp (A) for plant cultivation has the shape of a straight pipe fluorescent lamp, and includes: a body part 1 where a red LED element 3 and a blue LED element 4 are arranged； a feeding terminal 2 set up to the end part of the body part 1； and a switching circuit switching over electric current supplied from the feeding terminal 2 to a drive circuit for the red LED element 3 or a drive circuit for the blue LED element 4. According to the plant cultivation LED lamp (A), plant growth promoting effect can be obtained by alternative irradiation of the red light and the blue light in relatively simple work utilizing existing fluorescent light instruments and the like as they are.【課題】生長促進効果に優れ、エネルギー効率が良く、簡便に設置が可能な植物栽培用光源の提供。【解決手段】直管蛍光ランプ形状を有し、赤色ＬＥＤ素子３と青色ＬＥＤ素子４が配置された本体部１と、本体部１の端部に備えられた給電端子２と、給電端子２から供給される電流を、赤色ＬＥＤ素子３の駆動回路又は青色ＬＥＤ素子４の駆動回路に切り換えて流すスイッチング回路と、を有する植物栽培用ＬＥＤランプＡを提供する。植物栽培用ＬＥＤランプＡによれば、既設の蛍光灯器具等をそのまま利用して比較的簡単な工事で赤色光と青色光の交互照明による植物の生長促進効果を得ることができる。【選択図】図１
